Summary

• If a user is watching the space where a Team Calendar is in and an event is created/edited in it, the user won't be notified about these changes.

Steps to Reproduce

1. Create a calendar
2. Have userA to be a watcher of the space where this calendar is at
3. Have userB to add an event or edit it without adding userA in the event
4. Save the changes

Expected Results

• The watchers will receive a notification of the changes made to the calendar's events.

Actual Results

• No notification is sent. In the logs, the following error is seen:

  2018-12-21 15:04:46,837 WARN [http-nio-26120-exec-10] [extra.calendar3.util.TimeZoneUtil] tryParseDateTimeStringForEventEdit Unable to parse date null time 8:00 AM
   -- referer: http://localhost:26120/c6120/display/CS/calendars | url: /c6120/rest/calendar-services/1.0/calendar/events.json | traceId: c76d11bbb790c94f | userName: renata
  

Notes

• This seems to be related to CONFSERVER-54550.

Workaround

• userA will have to stop watching the space and start watching the calendar to receive the event change's notifications.