Add :weeks to the list of variable duration parts

Since 434df00 week durations are no longer converted to days. This means
we need to add :weeks to the parts that ActiveSupport::TimeWithZone will
consider being of variable duration to take account of DST transitions.

Fixes #26039.

1 files changed, 1 insertions, 1 deletions

diff --git a/activesupport/lib/active_support/time_with_zone.rb b/activesupport/lib/active_support/time_with_zone.rb
index b1cec43124..d7c35e1950 100644
--- a/activesupport/lib/active_support/time_with_zone.rb
+++ b/activesupport/lib/active_support/time_with_zone.rb
@@ -481,7 +481,7 @@ module ActiveSupport
       end
 
       def duration_of_variable_length?(obj)
-        ActiveSupport::Duration === obj && obj.parts.any? {|p| [:years, :months, :days].include?(p[0]) }
+        ActiveSupport::Duration === obj && obj.parts.any? {|p| [:years, :months, :weeks, :days].include?(p[0]) }
       end
 
       def wrap_with_time_zone(time)