diff --git a/modules/timeutil/datetime.go b/modules/timeutil/datetime.go
index 02275bca0..80b96fa65 100644
--- a/modules/timeutil/datetime.go
+++ b/modules/timeutil/datetime.go
@@ -7,19 +7,54 @@ import (
 	"fmt"
 	"html"
 	"html/template"
+	"time"
 )
 
-// DateTime renders an absolute time HTML given a time as a string
-func DateTime(format, datetime, fallback string) template.HTML {
-	datetimeEscaped := html.EscapeString(datetime)
-	fallbackEscaped := html.EscapeString(fallback)
+// DateTime renders an absolute time HTML element by datetime.
+func DateTime(format string, datetime any) template.HTML {
+	if p, ok := datetime.(*time.Time); ok {
+		datetime = *p
+	}
+	if p, ok := datetime.(*TimeStamp); ok {
+		datetime = *p
+	}
+	switch v := datetime.(type) {
+	case TimeStamp:
+		datetime = v.AsTime()
+	case int:
+		datetime = TimeStamp(v).AsTime()
+	case int64:
+		datetime = TimeStamp(v).AsTime()
+	}
+
+	var datetimeEscaped, textEscaped string
+	switch v := datetime.(type) {
+	case nil:
+		return "N/A"
+	case string:
+		datetimeEscaped = html.EscapeString(v)
+		textEscaped = datetimeEscaped
+	case time.Time:
+		if v.IsZero() || v.Unix() == 0 {
+			return "N/A"
+		}
+		datetimeEscaped = html.EscapeString(v.Format(time.RFC3339))
+		if format == "full" {
+			textEscaped = html.EscapeString(v.Format("2006-01-02 15:04:05 -07:00"))
+		} else {
+			textEscaped = html.EscapeString(v.Format("2006-01-02"))
+		}
+	default:
+		panic(fmt.Sprintf("Unsupported time type %T", datetime))
+	}
+
 	switch format {
 	case "short":
-		return template.HTML(fmt.Sprintf(`<relative-time format="datetime" year="numeric" month="short" day="numeric" weekday="" datetime="%s">%s</relative-time>`, datetimeEscaped, fallbackEscaped))
+		return template.HTML(fmt.Sprintf(`<relative-time format="datetime" year="numeric" month="short" day="numeric" weekday="" datetime="%s">%s</relative-time>`, datetimeEscaped, textEscaped))
 	case "long":
-		return template.HTML(fmt.Sprintf(`<relative-time format="datetime" year="numeric" month="long" day="numeric" weekday="" datetime="%s">%s</relative-time>`, datetimeEscaped, fallbackEscaped))
+		return template.HTML(fmt.Sprintf(`<relative-time format="datetime" year="numeric" month="long" day="numeric" weekday="" datetime="%s">%s</relative-time>`, datetimeEscaped, textEscaped))
 	case "full":
-		return template.HTML(fmt.Sprintf(`<relative-time format="datetime" weekday="" year="numeric" month="short" day="numeric" hour="numeric" minute="numeric" second="numeric" datetime="%s">%s</relative-time>`, datetimeEscaped, fallbackEscaped))
+		return template.HTML(fmt.Sprintf(`<relative-time format="datetime" weekday="" year="numeric" month="short" day="numeric" hour="numeric" minute="numeric" second="numeric" datetime="%s">%s</relative-time>`, datetimeEscaped, textEscaped))
 	}
-	return template.HTML("error in DateTime")
+	panic(fmt.Sprintf("Unsupported format %s", format))
 }
diff --git a/modules/timeutil/datetime_test.go b/modules/timeutil/datetime_test.go
new file mode 100644
index 000000000..a5639b34f
--- /dev/null
+++ b/modules/timeutil/datetime_test.go
@@ -0,0 +1,45 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package timeutil
+
+import (
+	"testing"
+	"time"
+
+	"code.gitea.io/gitea/modules/setting"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestDateTime(t *testing.T) {
+	oldTz := setting.DefaultUILocation
+	setting.DefaultUILocation, _ = time.LoadLocation("America/New_York")
+	defer func() {
+		setting.DefaultUILocation = oldTz
+	}()
+
+	refTimeStr := "2018-01-01T00:00:00Z"
+	refTime, _ := time.Parse(time.RFC3339, refTimeStr)
+	refTimeStamp := TimeStamp(refTime.Unix())
+
+	assert.EqualValues(t, "N/A", DateTime("short", nil))
+	assert.EqualValues(t, "N/A", DateTime("short", 0))
+	assert.EqualValues(t, "N/A", DateTime("short", time.Time{}))
+	assert.EqualValues(t, "N/A", DateTime("short", TimeStamp(0)))
+
+	actual := DateTime("short", "invalid")
+	assert.EqualValues(t, `<relative-time format="datetime" year="numeric" month="short" day="numeric" weekday="" datetime="invalid">invalid</relative-time>`, actual)
+
+	actual = DateTime("short", refTimeStr)
+	assert.EqualValues(t, `<relative-time format="datetime" year="numeric" month="short" day="numeric" weekday="" datetime="2018-01-01T00:00:00Z">2018-01-01T00:00:00Z</relative-time>`, actual)
+
+	actual = DateTime("short", refTime)
+	assert.EqualValues(t, `<relative-time format="datetime" year="numeric" month="short" day="numeric" weekday="" datetime="2018-01-01T00:00:00Z">2018-01-01</relative-time>`, actual)
+
+	actual = DateTime("short", refTimeStamp)
+	assert.EqualValues(t, `<relative-time format="datetime" year="numeric" month="short" day="numeric" weekday="" datetime="2017-12-31T19:00:00-05:00">2017-12-31</relative-time>`, actual)
+
+	actual = DateTime("full", refTimeStamp)
+	assert.EqualValues(t, `<relative-time format="datetime" weekday="" year="numeric" month="short" day="numeric" hour="numeric" minute="numeric" second="numeric" datetime="2017-12-31T19:00:00-05:00">2017-12-31 19:00:00 -05:00</relative-time>`, actual)
+}
diff --git a/modules/timeutil/since.go b/modules/timeutil/since.go
index 4aee814ec..04fcff54a 100644
--- a/modules/timeutil/since.go
+++ b/modules/timeutil/since.go
@@ -115,7 +115,7 @@ func timeSincePro(then, now time.Time, lang translation.Locale) string {
 }
 
 func timeSinceUnix(then, now time.Time, lang translation.Locale) template.HTML {
-	friendlyText := then.Format("2006-01-02 15:04:05 +07:00")
+	friendlyText := then.Format("2006-01-02 15:04:05 -07:00")
 
 	// document: https://github.com/github/relative-time-element
 	attrs := `tense="past"`
diff --git a/templates/admin/auth/list.tmpl b/templates/admin/auth/list.tmpl
index f8e15edde..c9f7c0d51 100644
--- a/templates/admin/auth/list.tmpl
+++ b/templates/admin/auth/list.tmpl
@@ -26,8 +26,8 @@
 							<td><a href="{{AppSubUrl}}/admin/auths/{{.ID}}">{{.Name}}</a></td>
 							<td>{{.TypeName}}</td>
 							<td>{{if .IsActive}}{{svg "octicon-check"}}{{else}}{{svg "octicon-x"}}{{end}}</td>
-							<td>{{DateTime "short" .UpdatedUnix.FormatLong .UpdatedUnix.FormatShort}}</td>
-							<td>{{DateTime "short" .CreatedUnix.FormatLong .CreatedUnix.FormatShort}}</td>
+							<td>{{DateTime "short" .UpdatedUnix}}</td>
+							<td>{{DateTime "short" .CreatedUnix}}</td>
 							<td><a href="{{AppSubUrl}}/admin/auths/{{.ID}}">{{svg "octicon-pencil"}}</a></td>
 						</tr>
 					{{end}}
diff --git a/templates/admin/cron.tmpl b/templates/admin/cron.tmpl
index 5dd631494..267da0075 100644
--- a/templates/admin/cron.tmpl
+++ b/templates/admin/cron.tmpl
@@ -21,8 +21,8 @@
 						<td><button type="submit" class="ui green button" name="op" value="{{.Name}}" title="{{$.locale.Tr "admin.dashboard.operation_run"}}">{{svg "octicon-triangle-right"}}</button></td>
 						<td>{{$.locale.Tr (printf "admin.dashboard.%s" .Name)}}</td>
 						<td>{{.Spec}}</td>
-						<td>{{DateTime "full" (DateFmtLong .Next) (DateFmtLong .Next)}}</td>
-						<td>{{if gt .Prev.Year 1}}{{DateTime "full" (DateFmtLong .Prev) (DateFmtLong .Prev)}}{{else}}N/A{{end}}</td>
+						<td>{{DateTime "full" (DateFmtLong .Next)}}</td>
+						<td>{{if gt .Prev.Year 1}}{{DateTime "full" .Prev}}{{else}}N/A{{end}}</td>
 						<td>{{.ExecTimes}}</td>
 						<td {{if ne .Status ""}}data-tooltip-content="{{.FormatLastMessage $.locale}}"{{end}} >{{if eq .Status ""}}—{{else if eq .Status "finished"}}{{svg "octicon-check" 16}}{{else}}{{svg "octicon-x" 16}}{{end}}</td>
 					</tr>
diff --git a/templates/admin/notice.tmpl b/templates/admin/notice.tmpl
index 51b0c6850..bd6b74dd2 100644
--- a/templates/admin/notice.tmpl
+++ b/templates/admin/notice.tmpl
@@ -26,7 +26,7 @@
 							<td>{{.ID}}</td>
 							<td>{{$.locale.Tr .TrStr}}</td>
 							<td class="view-detail"><span class="notice-description text truncate">{{.Description}}</span></td>
-							<td>{{DateTime "short" .CreatedUnix.FormatLong .CreatedUnix.FormatShort}}</td>
+							<td>{{DateTime "short" .CreatedUnix}}</td>
 							<td><a href="#">{{svg "octicon-note" 16 "view-detail"}}</a></td>
 						</tr>
 					{{end}}
diff --git a/templates/admin/org/list.tmpl b/templates/admin/org/list.tmpl
index 73435fdd3..a400dcbc8 100644
--- a/templates/admin/org/list.tmpl
+++ b/templates/admin/org/list.tmpl
@@ -41,7 +41,7 @@
 							<td>{{.NumTeams}}</td>
 							<td>{{.NumMembers}}</td>
 							<td>{{.NumRepos}}</td>
-							<td>{{DateTime "short" .CreatedUnix.FormatLong .CreatedUnix.FormatShort}}</td>
+							<td>{{DateTime "short" .CreatedUnix}}</td>
 							<td><a href="{{.OrganisationLink}}/settings">{{svg "octicon-pencil"}}</a></td>
 						</tr>
 					{{end}}
diff --git a/templates/admin/packages/list.tmpl b/templates/admin/packages/list.tmpl
index 2edcad4b7..f320878b8 100644
--- a/templates/admin/packages/list.tmpl
+++ b/templates/admin/packages/list.tmpl
@@ -65,7 +65,7 @@
 							{{end}}
 							</td>
 							<td>{{FileSize .CalculateBlobSize}}</td>
-							<td>{{DateTime "short" .Version.CreatedUnix.FormatLong .Version.CreatedUnix.FormatShort}}</td>
+							<td>{{DateTime "short" .Version.CreatedUnix}}</td>
 							<td><a class="delete-button" href="" data-url="{{$.Link}}/delete?page={{$.Page.Paginater.Current}}&sort={{$.SortType}}" data-id="{{.Version.ID}}" data-name="{{.Package.Name}}" data-data-version="{{.Version.Version}}">{{svg "octicon-trash"}}</a></td>
 						</tr>
 					{{end}}
diff --git a/templates/admin/queue.tmpl b/templates/admin/queue.tmpl
index d3052c91a..3de01a32a 100644
--- a/templates/admin/queue.tmpl
+++ b/templates/admin/queue.tmpl
@@ -155,8 +155,8 @@
 					{{range .Queue.Workers}}
 					<tr>
 						<td>{{.Workers}}{{if .IsFlusher}}<span title="{{$.locale.Tr "admin.monitor.queue.flush"}}">{{svg "octicon-sync"}}</span>{{end}}</td>
-						<td>{{DateTime "full" (DateFmtLong .Start) (DateFmtLong .Start)}}</td>
-						<td>{{if .HasTimeout}}{{DateTime "full" (DateFmtLong .Timeout) (DateFmtLong .Timeout)}}{{else}}-{{end}}</td>
+						<td>{{DateTime "full" .Start}}</td>
+						<td>{{if .HasTimeout}}{{DateTime "full" .Timeout}}{{else}}-{{end}}</td>
 						<td>
 							<a class="delete-button" href="" data-url="{{$.Link}}/cancel/{{.PID}}" data-id="{{.PID}}" data-name="{{.Workers}}" title="{{$.locale.Tr "remove"}}">{{svg "octicon-trash"}}</a>
 						</td>
diff --git a/templates/admin/repo/list.tmpl b/templates/admin/repo/list.tmpl
index f9a0a6ef9..3d09f2de2 100644
--- a/templates/admin/repo/list.tmpl
+++ b/templates/admin/repo/list.tmpl
@@ -80,7 +80,7 @@
 							<td>{{.NumForks}}</td>
 							<td>{{.NumIssues}}</td>
 							<td>{{FileSize .Size}}</td>
-							<td>{{DateTime "short" .CreatedUnix.FormatLong .CreatedUnix.FormatShort}}</td>
+							<td>{{DateTime "short" .CreatedUnix}}</td>
 							<td><a class="delete-button" href="" data-url="{{$.Link}}/delete?page={{$.Page.Paginater.Current}}&sort={{$.SortType}}" data-id="{{.ID}}" data-name="{{.Name}}">{{svg "octicon-trash"}}</a></td>
 						</tr>
 					{{end}}
diff --git a/templates/admin/user/list.tmpl b/templates/admin/user/list.tmpl
index fef7c7b27..2f76f2d3b 100644
--- a/templates/admin/user/list.tmpl
+++ b/templates/admin/user/list.tmpl
@@ -91,9 +91,9 @@
 							<td>{{if .IsRestricted}}{{svg "octicon-check"}}{{else}}{{svg "octicon-x"}}{{end}}</td>
 							<td>{{if index $.UsersTwoFaStatus .ID}}{{svg "octicon-check"}}{{else}}{{svg "octicon-x"}}{{end}}</td>
 							<td>{{.NumRepos}}</td>
-							<td>{{DateTime "short" .CreatedUnix.FormatLong .CreatedUnix.FormatShort}}</td>
+							<td>{{DateTime "short" .CreatedUnix}}</td>
 							{{if .LastLoginUnix}}
-								<td>{{DateTime "short" .LastLoginUnix.FormatLong .LastLoginUnix.FormatShort}}</td>
+								<td>{{DateTime "short" .LastLoginUnix}}</td>
 							{{else}}
 								<td><span>{{$.locale.Tr "admin.users.never_login"}}</span></td>
 							{{end}}
diff --git a/templates/explore/organizations.tmpl b/templates/explore/organizations.tmpl
index e61a72b6e..295818f94 100644
--- a/templates/explore/organizations.tmpl
+++ b/templates/explore/organizations.tmpl
@@ -23,7 +23,7 @@
 								{{svg "octicon-link"}}
 								<a href="{{.Website}}" rel="nofollow">{{.Website}}</a>
 							{{end}}
-							{{svg "octicon-clock"}} {{$.locale.Tr "user.join_on"}} {{DateTime "short" .CreatedUnix.FormatLong .CreatedUnix.FormatShort}}
+							{{svg "octicon-clock"}} {{$.locale.Tr "user.join_on"}} {{DateTime "short" .CreatedUnix}}
 						</div>
 					</div>
 				</div>
diff --git a/templates/explore/users.tmpl b/templates/explore/users.tmpl
index 4cab94ee8..0c1ba2744 100644
--- a/templates/explore/users.tmpl
+++ b/templates/explore/users.tmpl
@@ -18,7 +18,7 @@
 								{{svg "octicon-mail"}}
 								<a href="mailto:{{.Email}}" rel="nofollow">{{.Email}}</a>
 							{{end}}
-							{{svg "octicon-clock"}} {{$.locale.Tr "user.join_on"}} {{DateTime "short" .CreatedUnix.FormatLong .CreatedUnix.FormatShort}}
+							{{svg "octicon-clock"}} {{$.locale.Tr "user.join_on"}} {{DateTime "short" .CreatedUnix}}
 						</div>
 					</div>
 				</div>
diff --git a/templates/package/shared/cleanup_rules/preview.tmpl b/templates/package/shared/cleanup_rules/preview.tmpl
index ae1ce1b1d..5992ea60b 100644
--- a/templates/package/shared/cleanup_rules/preview.tmpl
+++ b/templates/package/shared/cleanup_rules/preview.tmpl
@@ -22,7 +22,7 @@
 					<td><a href="{{.FullWebLink}}">{{.Version.Version}}</a></td>
 					<td><a href="{{.Creator.HomeLink}}">{{.Creator.Name}}</a></td>
 					<td>{{FileSize .CalculateBlobSize}}</td>
-					<td>{{DateTime "short" .Version.CreatedUnix.FormatLong .Version.CreatedUnix.FormatShort}}</td>
+					<td>{{DateTime "short" .Version.CreatedUnix}}</td>
 				</tr>
 			{{else}}
 				<tr>
diff --git a/templates/package/view.tmpl b/templates/package/view.tmpl
index 36b0e8a8b..3cb130851 100644
--- a/templates/package/view.tmpl
+++ b/templates/package/view.tmpl
@@ -86,7 +86,7 @@
 							{{range .LatestVersions}}
 								<div class="item gt-df">
 									<a class="gt-f1" href="{{$.PackageDescriptor.PackageWebLink}}/{{PathEscape .LowerVersion}}">{{.Version}}</a>
-									<span class="text small">{{DateTime "short" (.CreatedUnix.FormatDate) (.CreatedUnix.FormatDate)}}</span>
+									<span class="text small">{{DateTime "short" .CreatedUnix}}</span>
 								</div>
 							{{end}}
 							</div>
diff --git a/templates/repo/activity.tmpl b/templates/repo/activity.tmpl
index 26734e304..9d15cec05 100644
--- a/templates/repo/activity.tmpl
+++ b/templates/repo/activity.tmpl
@@ -2,7 +2,7 @@
 <div role="main" aria-label="{{.Title}}" class="page-content repository commits">
 	{{template "repo/header" .}}
 	<div class="ui container">
-		<h2 class="ui header">{{DateTime "long" .DateFrom .DateFrom}} - {{DateTime "long" .DateUntil .DateUntil}}
+		<h2 class="ui header">{{DateTime "long" .DateFrom}} - {{DateTime "long" .DateUntil}}
 			<div class="ui right">
 				<!-- Period -->
 				<div class="ui floating dropdown jump filter">
diff --git a/templates/repo/issue/milestone_issues.tmpl b/templates/repo/issue/milestone_issues.tmpl
index ccbc40586..472bebb33 100644
--- a/templates/repo/issue/milestone_issues.tmpl
+++ b/templates/repo/issue/milestone_issues.tmpl
@@ -35,7 +35,7 @@
 				{{else}}
 					{{svg "octicon-calendar"}}
 					{{if .Milestone.DeadlineString}}
-						<span {{if .IsOverdue}}class="overdue"{{end}}>{{DateTime "short" .Milestone.DeadlineString .Milestone.DeadlineString}}</span>
+						<span {{if .IsOverdue}}class="overdue"{{end}}>{{DateTime "short" .Milestone.DeadlineString}}</span>
 					{{else}}
 						{{$.locale.Tr "repo.milestones.no_due_date"}}
 					{{end}}
diff --git a/templates/repo/issue/milestones.tmpl b/templates/repo/issue/milestones.tmpl
index b2428237a..3a23d225c 100644
--- a/templates/repo/issue/milestones.tmpl
+++ b/templates/repo/issue/milestones.tmpl
@@ -77,7 +77,7 @@
 						{{else}}
 							{{svg "octicon-calendar"}}
 							{{if .DeadlineString}}
-								<span {{if .IsOverdue}}class="overdue"{{end}}>{{DateTime "short" .DeadlineString .DeadlineString}}</span>
+								<span {{if .IsOverdue}}class="overdue"{{end}}>{{DateTime "short" .DeadlineString}}</span>
 							{{else}}
 								{{$.locale.Tr "repo.milestones.no_due_date"}}
 							{{end}}
diff --git a/templates/repo/issue/view_content/comments.tmpl b/templates/repo/issue/view_content/comments.tmpl
index 142c8153f..b99e49a58 100644
--- a/templates/repo/issue/view_content/comments.tmpl
+++ b/templates/repo/issue/view_content/comments.tmpl
@@ -295,7 +295,7 @@
 				{{template "shared/user/avatarlink" dict "Context" $.Context "user" .Poster}}
 				<span class="text grey muted-links">
 					{{template "shared/user/authorlink" .Poster}}
-					{{$.locale.Tr "repo.issues.due_date_added" (DateTime "long" .Content .Content) $createdStr | Safe}}
+					{{$.locale.Tr "repo.issues.due_date_added" (DateTime "long" .Content) $createdStr | Safe}}
 				</span>
 			</div>
 		{{else if eq .Type 17}}
@@ -305,8 +305,8 @@
 				<span class="text grey muted-links">
 					{{template "shared/user/authorlink" .Poster}}
 					{{$parsedDeadline := .Content | ParseDeadline}}
-					{{$from := DateTime "long" (index $parsedDeadline 1) (index $parsedDeadline 1)}}
-					{{$to := DateTime "long" (index $parsedDeadline 0) (index $parsedDeadline 0)}}
+					{{$from := DateTime "long" (index $parsedDeadline 1)}}
+					{{$to := DateTime "long" (index $parsedDeadline 0)}}
 					{{$.locale.Tr "repo.issues.due_date_modified" $to $from $createdStr | Safe}}
 				</span>
 			</div>
@@ -316,7 +316,7 @@
 				{{template "shared/user/avatarlink" dict "Context" $.Context "user" .Poster}}
 				<span class="text grey muted-links">
 					{{template "shared/user/authorlink" .Poster}}
-					{{$.locale.Tr "repo.issues.due_date_remove" (DateTime "long" .Content .Content) $createdStr | Safe}}
+					{{$.locale.Tr "repo.issues.due_date_remove" (DateTime "long" .Content) $createdStr | Safe}}
 				</span>
 			</div>
 		{{else if eq .Type 19}}
diff --git a/templates/repo/issue/view_content/sidebar.tmpl b/templates/repo/issue/view_content/sidebar.tmpl
index 248fc71b0..fad0aadaf 100644
--- a/templates/repo/issue/view_content/sidebar.tmpl
+++ b/templates/repo/issue/view_content/sidebar.tmpl
@@ -385,7 +385,7 @@
 					<div class="gt-df gt-sb gt-ac">
 						<div class="due-date {{if .Issue.IsOverdue}}text red{{end}}" {{if .Issue.IsOverdue}}data-tooltip-content="{{.locale.Tr "repo.issues.due_date_overdue"}}"{{end}}>
 							{{svg "octicon-calendar" 16 "gt-mr-3"}}
-							{{DateTime "long" .Issue.DeadlineUnix.FormatDate .Issue.DeadlineUnix.FormatDate}}
+							{{DateTime "long" .Issue.DeadlineUnix}}
 						</div>
 						<div>
 							{{if and .HasIssuesOrPullsWritePermission (not .Repository.IsArchived)}}
diff --git a/templates/repo/settings/deploy_keys.tmpl b/templates/repo/settings/deploy_keys.tmpl
index caf049acd..1a0f8f826 100644
--- a/templates/repo/settings/deploy_keys.tmpl
+++ b/templates/repo/settings/deploy_keys.tmpl
@@ -60,7 +60,7 @@
 									{{.Fingerprint}}
 								</div>
 								<div class="activity meta">
-									<i>{{$.locale.Tr "settings.add_on"}} <span>{{DateTime "short" .CreatedUnix.FormatLong .CreatedUnix.FormatShort}}</span> —  {{svg "octicon-info"}} {{if .HasUsed}}{{$.locale.Tr "settings.last_used"}} <span {{if .HasRecentActivity}}class="green"{{end}}>{{DateTime "short" .UpdatedUnix.FormatLong .UpdatedUnix.FormatShort}}</span>{{else}}{{$.locale.Tr "settings.no_activity"}}{{end}} - <span>{{$.locale.Tr "settings.can_read_info"}}{{if not .IsReadOnly}} / {{$.locale.Tr "settings.can_write_info"}} {{end}}</span></i>
+									<i>{{$.locale.Tr "settings.add_on"}} <span>{{DateTime "short" .CreatedUnix}}</span> —  {{svg "octicon-info"}} {{if .HasUsed}}{{$.locale.Tr "settings.last_used"}} <span {{if .HasRecentActivity}}class="green"{{end}}>{{DateTime "short" .UpdatedUnix.FormatLong .UpdatedUnix.FormatShort}}</span>{{else}}{{$.locale.Tr "settings.no_activity"}}{{end}} - <span>{{$.locale.Tr "settings.can_read_info"}}{{if not .IsReadOnly}} / {{$.locale.Tr "settings.can_write_info"}} {{end}}</span></i>
 								</div>
 							</div>
 						</div>
diff --git a/templates/repo/settings/options.tmpl b/templates/repo/settings/options.tmpl
index a974401e8..515854609 100644
--- a/templates/repo/settings/options.tmpl
+++ b/templates/repo/settings/options.tmpl
@@ -89,7 +89,7 @@
 						<tr>
 							<td>{{(MirrorRemoteAddress $.Context .Repository .Mirror.GetRemoteName false).Address}}</td>
 							<td>{{$.locale.Tr "repo.settings.mirror_settings.direction.pull"}}</td>
-							<td>{{DateTime "full" .Mirror.UpdatedUnix.FormatLong .Mirror.UpdatedUnix.AsTime}}</td>
+							<td>{{DateTime "full" .Mirror.UpdatedUnix}}</td>
 							<td class="right aligned">
 								<form method="post" style="display: inline-block">
 									{{.CsrfTokenHtml}}
@@ -167,7 +167,7 @@
 							{{$address := MirrorRemoteAddress $.Context $.Repository .GetRemoteName true}}
 							<td class="gt-word-break">{{$address.Address}}</td>
 							<td>{{$.locale.Tr "repo.settings.mirror_settings.direction.push"}}</td>
-							<td>{{if .LastUpdateUnix}}{{DateTime "full" .LastUpdateUnix.FormatLong .LastUpdateUnix.AsTime}}{{else}}{{$.locale.Tr "never"}}{{end}} {{if .LastError}}<div class="ui red label" data-tooltip-content="{{.LastError}}">{{$.locale.Tr "error"}}</div>{{end}}</td>
+							<td>{{if .LastUpdateUnix}}{{DateTime "full" .LastUpdateUnix}}{{else}}{{$.locale.Tr "never"}}{{end}} {{if .LastError}}<div class="ui red label" data-tooltip-content="{{.LastError}}">{{$.locale.Tr "error"}}</div>{{end}}</td>
 							<td class="right aligned">
 								<form method="post" style="display: inline-block">
 									{{$.CsrfTokenHtml}}
diff --git a/templates/repo/user_cards.tmpl b/templates/repo/user_cards.tmpl
index 5acea0b4d..bc159f523 100644
--- a/templates/repo/user_cards.tmpl
+++ b/templates/repo/user_cards.tmpl
@@ -18,7 +18,7 @@
 					{{else if .Location}}
 						{{svg "octicon-location"}} {{.Location}}
 					{{else}}
-						{{svg "octicon-clock"}} {{$.locale.Tr "user.join_on"}} {{DateTime "short" .CreatedUnix.FormatLong .CreatedUnix.FormatShort}}
+						{{svg "octicon-clock"}} {{$.locale.Tr "user.join_on"}} {{DateTime "short" .CreatedUnix}}
 					{{end}}
 				</div>
 			</li>
diff --git a/templates/shared/issuelist.tmpl b/templates/shared/issuelist.tmpl
index d3d9729fe..3b3547108 100644
--- a/templates/shared/issuelist.tmpl
+++ b/templates/shared/issuelist.tmpl
@@ -106,7 +106,7 @@
 						<span class="due-date" data-tooltip-content="{{$.locale.Tr "repo.issues.due_date"}}">
 							<span{{if .IsOverdue}} class="overdue"{{end}}>
 								{{svg "octicon-calendar" 14 "gt-mr-2"}}
-								{{DateTime "short" .DeadlineUnix.FormatDate .DeadlineUnix.FormatShort}}
+								{{DateTime "short" .DeadlineUnix}}
 							</span>
 						</span>
 					{{end}}
diff --git a/templates/status/500.tmpl b/templates/status/500.tmpl
index 27c087bc1..bca038775 100644
--- a/templates/status/500.tmpl
+++ b/templates/status/500.tmpl
@@ -6,7 +6,7 @@
 	<div class="ui container gt-mt-5">
 		{{if .ErrorMsg}}
 			<p>{{.locale.Tr "error.occurred"}}:</p>
-			<pre class="gt-whitespace-pre-wrap">{{.ErrorMsg}}</pre>
+			<pre class="gt-whitespace-pre-wrap gt-break-all">{{.ErrorMsg}}</pre>
 		{{end}}
 
 		<div class="center gt-mt-5">
diff --git a/templates/user/dashboard/milestones.tmpl b/templates/user/dashboard/milestones.tmpl
index 468bde0b7..aaa728dab 100644
--- a/templates/user/dashboard/milestones.tmpl
+++ b/templates/user/dashboard/milestones.tmpl
@@ -97,7 +97,7 @@
 								{{else}}
 									{{svg "octicon-calendar"}}
 									{{if .DeadlineString}}
-										<span {{if .IsOverdue}}class="overdue"{{end}}>{{DateTime "short" .DeadlineString .DeadlineString}}</span>
+										<span {{if .IsOverdue}}class="overdue"{{end}}>{{DateTime "short" .DeadlineString}}</span>
 									{{else}}
 										{{$.locale.Tr "repo.milestones.no_due_date"}}
 									{{end}}
diff --git a/templates/user/profile.tmpl b/templates/user/profile.tmpl
index 2ad92612a..c3a06a16e 100644
--- a/templates/user/profile.tmpl
+++ b/templates/user/profile.tmpl
@@ -73,7 +73,7 @@
 									</li>
 								{{end}}
 							{{end}}
-							<li>{{svg "octicon-clock"}} {{.locale.Tr "user.join_on"}} {{DateTime "short" .ContextUser.CreatedUnix.FormatLong .ContextUser.CreatedUnix.FormatShort}}</li>
+							<li>{{svg "octicon-clock"}} {{.locale.Tr "user.join_on"}} {{DateTime "short" .ContextUser.CreatedUnix}}</li>
 							{{if and .Orgs .HasOrgsVisible}}
 							<li>
 								<ul class="user-orgs">
diff --git a/templates/user/settings/applications.tmpl b/templates/user/settings/applications.tmpl
index 142bfa0a2..ffb9a8f67 100644
--- a/templates/user/settings/applications.tmpl
+++ b/templates/user/settings/applications.tmpl
@@ -27,7 +27,7 @@
 								</ul>
 							</details>
 							<div class="activity meta">
-								<i>{{$.locale.Tr "settings.add_on"}} <span>{{DateTime "short" .CreatedUnix.FormatLong .CreatedUnix.FormatShort}}</span> — {{svg "octicon-info"}} {{if .HasUsed}}{{$.locale.Tr "settings.last_used"}} <span {{if .HasRecentActivity}}class="green"{{end}}>{{DateTime "short" .UpdatedUnix.FormatLong .UpdatedUnix.FormatShort}}</span>{{else}}{{$.locale.Tr "settings.no_activity"}}{{end}}</i>
+								<i>{{$.locale.Tr "settings.add_on"}} <span>{{DateTime "short" .CreatedUnix}}</span> — {{svg "octicon-info"}} {{if .HasUsed}}{{$.locale.Tr "settings.last_used"}} <span {{if .HasRecentActivity}}class="green"{{end}}>{{DateTime "short" .UpdatedUnix.FormatLong .UpdatedUnix.FormatShort}}</span>{{else}}{{$.locale.Tr "settings.no_activity"}}{{end}}</i>
 							</div>
 						</div>
 					</div>
diff --git a/templates/user/settings/grants_oauth2.tmpl b/templates/user/settings/grants_oauth2.tmpl
index a3b549722..8f48aee15 100644
--- a/templates/user/settings/grants_oauth2.tmpl
+++ b/templates/user/settings/grants_oauth2.tmpl
@@ -20,7 +20,7 @@
 				<div class="content">
 					<strong>{{$grant.Application.Name}}</strong>
 					<div class="activity meta">
-						<i>{{$.locale.Tr "settings.add_on"}} <span>{{DateTime "short" $grant.CreatedUnix.FormatLong $grant.CreatedUnix.FormatShort}}</span></i>
+						<i>{{$.locale.Tr "settings.add_on"}} <span>{{DateTime "short" $grant.CreatedUnix}}</span></i>
 					</div>
 				</div>
 			</div>
diff --git a/templates/user/settings/keys_gpg.tmpl b/templates/user/settings/keys_gpg.tmpl
index d255760cd..b15fb5686 100644
--- a/templates/user/settings/keys_gpg.tmpl
+++ b/templates/user/settings/keys_gpg.tmpl
@@ -68,9 +68,9 @@
 						<b>{{$.locale.Tr "settings.subkeys"}}:</b> {{range .SubsKey}} {{.PaddedKeyID}} {{end}}
 					</div>
 					<div class="activity meta">
-						<i>{{$.locale.Tr "settings.add_on"}} <span>{{DateTime "short" .AddedUnix.FormatLong .AddedUnix.FormatShort}}</span></i>
+						<i>{{$.locale.Tr "settings.add_on"}} <span>{{DateTime "short" .AddedUnix}}</span></i>
 						-
-						<i>{{if not .ExpiredUnix.IsZero}}{{$.locale.Tr "settings.valid_until"}} <span>{{DateTime "short" .ExpiredUnix.FormatLong .ExpiredUnix.FormatShort}}</span>{{else}}{{$.locale.Tr "settings.valid_forever"}}{{end}}</i>
+						<i>{{if not .ExpiredUnix.IsZero}}{{$.locale.Tr "settings.valid_until"}} <span>{{DateTime "short" .ExpiredUnix}}</span>{{else}}{{$.locale.Tr "settings.valid_forever"}}{{end}}</i>
 					</div>
 				</div>
 			</div>
diff --git a/templates/user/settings/keys_principal.tmpl b/templates/user/settings/keys_principal.tmpl
index 7cde3e37a..020a56479 100644
--- a/templates/user/settings/keys_principal.tmpl
+++ b/templates/user/settings/keys_principal.tmpl
@@ -25,7 +25,7 @@
 					<div class="content">
 						<strong>{{.Name}}</strong>
 						<div class="activity meta">
-							<i>{{$.locale.Tr "settings.add_on"}} <span>{{DateTime "short" .CreatedUnix.FormatLong .CreatedUnix.FormatShort}}</span> —  {{svg "octicon-info" 16}} {{if .HasUsed}}{{$.locale.Tr "settings.last_used"}} <span {{if .HasRecentActivity}}class="green"{{end}}>{{DateTime "short" .UpdatedUnix.FormatLong .UpdatedUnix.FormatShort}}</span>{{else}}{{$.locale.Tr "settings.no_activity"}}{{end}}</i>
+							<i>{{$.locale.Tr "settings.add_on"}} <span>{{DateTime "short" .CreatedUnix}}</span> —  {{svg "octicon-info" 16}} {{if .HasUsed}}{{$.locale.Tr "settings.last_used"}} <span {{if .HasRecentActivity}}class="green"{{end}}>{{DateTime "short" .UpdatedUnix.FormatLong .UpdatedUnix.FormatShort}}</span>{{else}}{{$.locale.Tr "settings.no_activity"}}{{end}}</i>
 						</div>
 					</div>
 				</div>
diff --git a/templates/user/settings/keys_ssh.tmpl b/templates/user/settings/keys_ssh.tmpl
index bf2523f57..2e46869ae 100644
--- a/templates/user/settings/keys_ssh.tmpl
+++ b/templates/user/settings/keys_ssh.tmpl
@@ -59,7 +59,7 @@
 								{{.Fingerprint}}
 						</div>
 						<div class="activity meta">
-								<i>{{$.locale.Tr "settings.add_on"}} <span>{{DateTime "short" .CreatedUnix.FormatLong .CreatedUnix.FormatShort}}</span> —	{{svg "octicon-info"}} {{if .HasUsed}}{{$.locale.Tr "settings.last_used"}} <span {{if .HasRecentActivity}}class="green"{{end}}>{{DateTime "short" .UpdatedUnix.FormatLong .UpdatedUnix.FormatShort}}</span>{{else}}{{$.locale.Tr "settings.no_activity"}}{{end}}</i>
+								<i>{{$.locale.Tr "settings.add_on"}} <span>{{DateTime "short" .CreatedUnix}}</span> —	{{svg "octicon-info"}} {{if .HasUsed}}{{$.locale.Tr "settings.last_used"}} <span {{if .HasRecentActivity}}class="green"{{end}}>{{DateTime "short" .UpdatedUnix.FormatLong .UpdatedUnix.FormatShort}}</span>{{else}}{{$.locale.Tr "settings.no_activity"}}{{end}}</i>
 						</div>
 				</div>
 			</div>
diff --git a/web_src/css/helpers.css b/web_src/css/helpers.css
index 750ec4422..70ac8ff46 100644
--- a/web_src/css/helpers.css
+++ b/web_src/css/helpers.css
@@ -23,15 +23,6 @@ Gitea's private styles use `g-` prefix.
 .gt-h-100 { height: 100% !important; }
 .gt-br-0 { border-radius: 0 !important; }
 
-/* below class names match Tailwind CSS */
-.gt-pointer-events-none { pointer-events: none !important; }
-.gt-relative { position: relative !important; }
-.gt-overflow-x-scroll { overflow-x: scroll !important; }
-.gt-cursor-default { cursor: default !important; }
-.gt-items-start { align-items: flex-start !important; }
-.gt-whitespace-pre { white-space: pre !important; }
-.gt-invisible { visibility: hidden !important; }
-
 .gt-mono {
   font-family: var(--fonts-monospace) !important;
   font-size: .95em !important; /* compensate for monospace fonts being usually slightly larger */
@@ -51,6 +42,19 @@ Gitea's private styles use `g-` prefix.
   text-overflow: ellipsis !important;
 }
 
+/* below class names match Tailwind CSS */
+.gt-break-all { word-break: break-all !important; }
+.gt-content-center { align-content: center !important; }
+.gt-cursor-default { cursor: default !important; }
+.gt-invisible { visibility: hidden !important; }
+.gt-items-start { align-items: flex-start !important; }
+.gt-overflow-x-scroll { overflow-x: scroll !important; }
+.gt-pointer-events-none { pointer-events: none !important; }
+.gt-relative { position: relative !important; }
+.gt-whitespace-nowrap { white-space: nowrap !important; }
+.gt-whitespace-pre { white-space: pre !important; }
+.gt-whitespace-pre-wrap { white-space: pre-wrap !important; }
+
 .gt-w-screen { width: 100vw !important; }
 .gt-h-screen { height: 100vh !important; }
 
@@ -203,11 +207,7 @@ Gitea's private styles use `g-` prefix.
 .gt-gap-y-4 { row-gap: 1rem !important; }
 .gt-gap-y-5 { row-gap: 2rem !important; }
 
-.gt-content-center { align-content: center !important; }
-
 .gt-shrink-0 { flex-shrink: 0 !important; }
-.gt-whitespace-nowrap { white-space: nowrap !important; }
-.gt-whitespace-pre-wrap { white-space: pre-wrap !important; }
 
 @media (max-width: 767px) {
   .gt-db-small { display: block !important; }