Fix date format in show page.

app/controllers/announcements_controller.rb

@@ -263,7 +263,7 @@ class AnnouncementsController < ApplicationController
         "title" => announcement.title,
         "subtitle_ann" => subtitle_ann,
         "update_user" => update_user,
-        "updated_at" => announcement.postdate.strftime('%Y-%m-%d %H:%M'),
+        "updated_at" => announcement.postdate.in_time_zone(Time.zone.utc_offset / 3600).strftime('%Y-%m-%d %H:%M'),
         "body" =>announcement.text,
         "image" => announcement.image.url,
         "img_src" => img_src,
@@ -334,7 +334,7 @@ class AnnouncementsController < ApplicationController
         "title" => announcement["title_translations"][locale],
         "subtitle_ann" => subtitle_ann,
         "update_user" => update_user,
-        "updated_at" => datetime.strftime('%Y-%m-%d %H:%M'),
+        "updated_at" => datetime.in_time_zone(Time.zone.utc_offset / 3600).strftime('%Y-%m-%d %H:%M'),
         "body" => announcement["text_translations"][locale],
         "image" => announcement["image"]["original"],
         "img_src" => img_src,