Improvements to existing features

• [Exam taker] Clarify the timezone of the exam start time in the emails sent to exam takers: The time is shown in a timezone that may not be the timezone of the exam taker and they may not be familiar with the timezone notation. We've now added a link to the exam's "early page", where they can see the actual time at which the exam can be started in their local time zone.
   

The new email with the additional note to pay attention to the timezone

The page where the exam start time is shown in the exam taker’s own local timezone

• [API] When submitting a start_time and end_time for an exam via the API, the timezone specified (when using RFC9557 and IANA formatting) is now stored correctly in the database and used as the base timezone for the exam taker emails, instead of UTC. When submitting a time as epoch or ISO8601, the timezone of the exam will be set to UTC (instead of Europe/Amsterdam).

• [Admin] When creating an exam, the local timezone of the administrator is stored in the database and used as the base timezone for the exam taker emails, instead of Europe/Amsterdam.

Bug Fixes

• [Exam Taker] Fix for the remaining time widget, so that it correctly displays the ratio of remaining time to total time, even after the exam taker refreshes the page.