Changelog for the upcoming release (preview)

Some fixes compared to beta.2
Kept support for PHP 8.1

Added

• Timezone support for polls and options
  • Set default timezone for any poll
  • Choose timezone to display, if the poll's original timezone differs from the user's one
  • Choose timezone, when adding options in case of different timezones between poll and user

Changed

• Use ISO formatted timestamps and durations
• Drop support for Nexcloud Hub 10

Full Changelog: v9.0.0-beta.2...v9.0.0-beta.3