diff --git a/app/helpers/announcements_helper.rb b/app/helpers/announcements_helper.rb
index 276d03b..59eedf0 100644
--- a/app/helpers/announcements_helper.rb
+++ b/app/helpers/announcements_helper.rb
@@ -130,15 +130,34 @@ module AnnouncementsHelper
     end
     fans
   end
-  def filter_by_keywords(sorted,keywords)
-    if !keywords.to_s.empty?
+  def filter_by_keywords(sorted,keywords,stime,etime)
+    kflag = keywords.blank?
+    sflag = stime.blank?
+    eflag = etime.blank?
+    stime = stime.to_s.split('/')
+    stime = Time.zone.local(*stime) rescue nil
+    etime = etime.to_s.split('/')
+    etime = Time.zone.local(*etime) rescue nil
+    if !kflag || !sflag || !eflag
       sorted.select{|anns|
-        if anns["source-site"].present?
-          title = Nokogiri::HTML(anns["title"].to_s).text
+        if kflag
+          flag = true
         else
-          title = Nokogiri::HTML(anns.title.to_s).text
+          if anns["source-site"].present?
+            title = Nokogiri::HTML(anns["title"].to_s).text
+          else
+            title = Nokogiri::HTML(anns.title.to_s).text
+          end
+          flag = title.include?(keywords.to_s)
         end
-        title.include?(keywords.to_s)
+        if sflag && !eflag
+          flag = flag && (anns.postdate<=etime)
+        elsif !sflag && eflag
+          flag = flag && (anns.postdate>=stime)
+        elsif !sflag && !eflag
+          flag = flag && (anns.postdate>=stime) && (anns.postdate<=etime)
+        end
+        flag
       }
     else
       sorted
@@ -201,9 +220,9 @@ module AnnouncementsHelper
       else
         all_sorted = feeds_anns.select{|v| v['is_top']}.sort{|v1,v2| v2["postdate"]<=>v1["postdate"]} + feeds_anns.select{|v| v['is_top'] != true}.sort{|v1,v2| v2["postdate"]<=>v1["postdate"]}
       end
-      all_filter = filter_by_keywords(all_sorted,params[:keywords])
+      all_filter = filter_by_keywords(all_sorted,params[:keywords],params[:stime].params[:etime])
     else
-      all_filter = filter_by_keywords(announcements,params[:keywords])
+      all_filter = filter_by_keywords(announcements,params[:keywords],params[:stime],params[:etime])
     end
     if page_data_count != 0
       sorted = all_filter[(page_number-1)*page_data_count...page_number*page_data_count]
diff --git a/app/views/announcements/index.html.erb b/app/views/announcements/index.html.erb
index f767ddb..f00b115 100644
--- a/app/views/announcements/index.html.erb
+++ b/app/views/announcements/index.html.erb
@@ -30,7 +30,8 @@
     input.search_box{
       margin: 0;
       background: #a2c3df;
-      color: #9100ff;
+      font-weight: bold;
+      color: #00008b;
       border-radius: 0.7em;
       outline: 0;
     }
@@ -42,6 +43,18 @@
       background: #7201ff;
       color: white;
     }
+    input.search_box::-webkit-input-placeholder {
+      color: #aa58e8;
+      opacity: 1;
+    }
+    input.search_box:-moz-placeholder {
+      color: #aa58e8;
+      opacity: 1;
+    }
+    input.search_box::-moz-placeholder {
+      color: #aa58e8;
+      opacity: 1;
+    }
   </style>
   <form>
       <% cats = Array(page.categories)
@@ -52,9 +65,16 @@
       end
       all_cat = [[t('announcement.all'),'all']]
     %>
-    <div class="search_widget" style="font-size: 1.2em;">
+    <div class="search_widget" style="display: flex;flex-wrap: wrap;font-size: 1.1em;">
       <%= select_tag('category',options_for_select(all_cat.concat(cats.map{|v| [v.title,v.id.to_s]}),:selected => params['category'].to_s),:id=>"category_select_box",:prompt => t('announcement.select_prompt')) %>
-      <input class="search_box" type="text" name="keywords" value="<%= params['keywords'] %>" placeholder="<%= t('announcement.keywords') %>">
+      <input class="search_box" type="text" name="keywords" value="<%= params['keywords'].to_s.gsub(/\"/,'') %>" placeholder="<%= t('announcement.keywords') %>">
+      <div class="default_picker">
+        <input class="search_box" type="text" name="stime" value="<%= params['stime'].to_s.gsub(/\"/,'') %>" placeholder="<%= t('announcement.stime') %>" data-format="yyyy/mm/dd">
+      </div>
+      ~
+      <div class="default_picker">
+        <input class="search_box" type="text" name="etime" value="<%= params['etime'].to_s.gsub(/\"/,'') %>" placeholder="<%= t('announcement.etime') %>" data-format="yyyy/mm/dd">
+      </div>
       <input class="search_box" type="submit" value="<%= t('announcement.search') %>">
     </div>
   </form>
diff --git a/config/locales/en.yml b/config/locales/en.yml
index b9bbd0a..f3dd6ac 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -3,6 +3,8 @@ en:
     feed: Feed
     import: Import
   announcement:
+    stime: start time
+    etime: end time
     select_prompt: --select category--
     all: All
     keywords: Keywords
@@ -95,6 +97,7 @@ en:
       bulletins_and_web_links: Differential Nav.
       index: Index
       search: Search
+    more: More
     email_reminder: Email Reminder
     activate_email_reminder: Activate Email Reminder
     email_sentdate: Email Time
diff --git a/config/locales/zh_tw.yml b/config/locales/zh_tw.yml
index 098ba2a..2eba1e2 100644
--- a/config/locales/zh_tw.yml
+++ b/config/locales/zh_tw.yml
@@ -3,6 +3,8 @@ zh_tw:
     feed: 供給
     import: 匯入
   announcement:
+    stime: 開始時間
+    etime: 結束時間
     select_prompt: --選取類別--
     all: 全部
     keywords: 關鍵字