Time zone display in Team Calendars is inconsistent and doesn't use UTC

Summary

The display of time zones in Team Calendars is inconsistent with ISO 8601 standards.

Environment

• Team Calendars 5.3.10

Steps to Reproduce

1. Go to Calendars and click Add Calendar
2. Time zone is displayed in alphabetical order

   Time zone

   Australia/Sydney (+1100)

3. Click the ellipsis menu on a calendar
4. Select Edit
5. Time zone is displayed in alphabetical order

   Time zone

   Australia/Sydney (+1100)

Expected Results

• Time zone should display in time zone order and with correct formatting

  Time zone

  AEDT Australian Eastern Daylight Time (UTC+11)

Actual Results

• Time zone is displayed in alphabetical order

  Time zone

  Australia/Sydney (+1100)

Notes

Confluence also has issues with the display of time zones.

Workaround

No workaround.