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

Summary

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

Environment

• Confluence 5.9.5

Steps to Reproduce

1. Go to > General Configuration
2. Go to ADMINISTRATION > System Information
3. Look for System Timezone

   System Timezone

   Australia/Sydney

4. Go to User Menu > Profile > Settings

   Time zone

   Site Default ((GMT+1000) Sydney, Canberra, Melbourne

Expected Results

• System time zone should display as (for when this issue was created)

  System Time zone

  AEDT Australian Eastern Daylight Time (UTC+11)

• User time zone should display as

  System Time zone

  AEDT Australian Eastern Daylight Time (UTC+11)

Actual Results

• System Timezone displays as

  System Timezone

  Australia/Sydney

1. User time zone displays as

   Time zone

   Site Default ((GMT+1000) Sydney, Canberra, Melbourne

Notes

Team Calendar also has issues with the display of time zones.

Workaround

No workaround.