Disappearing Calendar Events - Has Anyone Experienced This?

[TJBB_ICR]

Hi everyone,

I'm hoping someone might have encountered this issue and can shed some light on it.

We’ve had a strange issue with a series of calendar events in Canvas for one of our modules. The series of events has been working fine, but today’s specific event has mysteriously disappeared from the calendar. The series continues as expected after today’s date, and all the other content (assignments, tasks, etc.) seems unaffected.

Here’s a summary of the situation:

• The event for today was definitely there this morning because it was displayed on a classroom screen for students to use during scheduling.
• Around midday, it vanished from the calendar without any apparent reason.
• No notifications of the event being deleted were received (we usually get these if something is removed).
• There are no conflicting events, deadlines, or quiz submissions that overlap with the missing calendar entry.
• None of the lecturers or admins made changes to the content or the calendar.

I’ve checked our Canvas settings and the event log, but I can’t find any explanation for why this might have happened.

Has anyone else experienced similar issues with calendar events disappearing? If so, do you know what might cause this or how to prevent it in the future?

Thanks in advance for any insights you can share!

[dbrace]

Hi @TJBB_ICR,

I have not had this happen but I have a way to help you try to gather more data/information:

1. does the event still exist in beta or test?
2. if the event exists there, are you able to find the link for the calendar event? (the ID/link would look something like https://<beta_canvas_instance/courses/XXXXX/calendar_events/YYYYY)
3. if you format the link so that it is https://<prod_canvas_instance/api/v1/calendar_events/YYYYY you can see the API version of the details of event from inside your web browser

When looking at the API version of the event, there are two items to take note of:

1. workflow_state <--- will most likely appear as either "active" or "deleted"
2. updated_at <--- this will show when the event was last updated (including the date and time of when it was deleted, if it was deleted)

I routinely use https://www.timestamp-converter.com to convert ISO 8601 to something that is easier to understand.

To the best of my knowledge, it is not possible to restore/undelete a deleted event but this should provide you with more data/information as you research what happened.

-Doug