diff --git a/app/models/p_hire.rb b/app/models/p_hire.rb
index 323a96e..f8640f5 100644
--- a/app/models/p_hire.rb
+++ b/app/models/p_hire.rb
@@ -119,6 +119,7 @@ class PHire
       if date_only
         @recurring_events = @recurring_events.where(:date.ne=>nil)
       end
+      start_date_utc_mjd = start_date.to_datetime.utc.mjd
       @recurring_events.each do |re|
         datet = re.date
         interval = 1.send(re.recurring_interval) rescue 0
@@ -133,10 +134,16 @@ class PHire
             period_str = nil
             if re.recurring_interval == "week"
               period_str = 'week'
-              add_interval = ((start_date - @start_date - 1.day).to_i / 7.day)
+              add_interval = (start_date_utc_mjd - @start_date.utc.mjd)
+              days = 7.day
+              if add_interval < 0
+                add_interval = -(-add_interval / days)
+              else
+                add_interval = add_interval / days
+              end
             else
               period_str = 'month'
-              add_interval = ((start_date.year * 12 + start_date.month) - (@start_date.year * 12 + @start_date.month) - 1)
+              add_interval = ((start_date.year * 12 + start_date.month) - (@start_date.year * 12 + @start_date.month))
             end
             add_interval = 0 if add_interval < 0
             add_interval = add_interval.send(period_str)