This is still broken as of 3.20.4. I am linked to Google Calendars and seeing 24hr format regardless of time format setting.
** Attachment added: "screen shot" https://bugs.launchpad.net/ubuntu/+source/gnome-calendar/+bug/1621539/+attachment/5067675/+files/Screenshot%20from%202018-03-02%2021-43-39.png -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-calendar in Ubuntu. https://bugs.launchpad.net/bugs/1621539 Title: Unable to schedule "PM" events in Gnome Calendar 3.20.2 Status in GNOME Calendar: Fix Released Status in gnome-calendar package in Ubuntu: Fix Released Status in gnome-calendar source package in Xenial: Fix Released Bug description: Impact ====== Users who have their computer time set to 12-hour time (AM/PM) instead of 24-hour are unable to schedule PM events in gnome-calendar. 12-hour time is the default in the United States. The update fixes this issue and a few more. https://git.gnome.org/browse/gnome-calendar/tree/NEWS?h=gnome-3-20 https://git.gnome.org/browse/gnome-calendar/log/?h=gnome-3-20 Test Case ========= 1. Open the Calendar app. 2. Click on a date to schedule a new event. Click Edit Details. 3. Are you able to set an event that starts and ends in the afternoon? Open the System Settings app. Click Time & Date. Switch time from 12-hour to 24-hour (or the opposite). Repeat steps 1-3. 4. Schedule a new event that starts on one day and ends on the next. Click the all-day box and hit Done. The event should span both days on the calendar. Regression Potential ==================== Low. This is a new upstream stable bugfix release and is recommended for all distros shipping GNOME 3.20. The 3.20.3 release was insufficient and might have made things worse ( https://bugzilla.gnome.org/770679 ), but for 3.20.4 I helped identify the git commits already applied in the 3.21 series to fix this issue. Original Bug Report =================== The bug is 100% reproducible. I can schedule "AM" events and all day events, but no "PM" events. I would expect the part of to advance after I had passed noon, but I can keep cycling through the first 12 hours of the day. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: gnome-calendar 3.20.2-0ubuntu0.1 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CurrentDesktop: GNOME Date: Thu Sep 8 10:56:05 2016 InstallationDate: Installed on 2013-04-26 (1231 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) SourcePackage: gnome-calendar UpgradeStatus: Upgraded to xenial on 2016-04-02 (159 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-calendar/+bug/1621539/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp