Write system tests for the new time zone feature, and set the application time zone to the user's time zone.
Source Code:
https://github.com/stevepolitodesign/...
https://github.com/stevepolitodesign/...
https://github.com/stevepolitodesign/...
Resources:
https://api.rubyonrails.org/v6.0.3.2/...
https://github.com/heartcombo/devise#...