Use Date.current and Time.current

Using Date.today and Time.now might lead to inconsistencies if the time
zone the application uses is not the same as the system time zone.

app/models/dashboard/action.rb

@@ -44,10 +44,10 @@ class Dashboard::Action < ApplicationRecord
   }
 
   def self.active_for(proposal)
-    published_at = proposal.published_at&.to_date || Date.today
+    published_at = proposal.published_at&.to_date || Date.current
 
     active.where("required_supports <= ?", proposal.cached_votes_up)
-          .where("day_offset <= ?", (Date.today - published_at).to_i)
+          .where("day_offset <= ?", (Date.current - published_at).to_i)
           .by_proposal(proposal)
   end
 
@@ -59,9 +59,9 @@ class Dashboard::Action < ApplicationRecord
   end
 
   def active_for?(proposal)
-    published_at = proposal.published_at&.to_date || Date.today
+    published_at = proposal.published_at&.to_date || Date.current
 
-    required_supports <= proposal.cached_votes_up && day_offset <= (Date.today - published_at).to_i
+    required_supports <= proposal.cached_votes_up && day_offset <= (Date.current - published_at).to_i
   end
 
   def requested_for?(proposal)
@@ -95,7 +95,7 @@ class Dashboard::Action < ApplicationRecord
   private
     def self.get_actions_for_today(proposal)
       proposal_votes = proposal.cached_votes_up
-      day_offset = calculate_day_offset(proposal, Date.today)
+      day_offset = calculate_day_offset(proposal, Date.current)
 
       calculate_actions(proposal_votes, day_offset, proposal)
     end

app/models/proposal.rb

@@ -96,7 +96,7 @@ class Proposal < ApplicationRecord
   end
 
   def publish
-    update(published_at: Time.now)
+    update(published_at: Time.current)
     send_new_actions_notification_on_published
   end