Future events are not synchronized when past event time limit is set

[sunkup]

Problem scope

• I'm sure that this is a DAVx⁵ problem.

App version

• I'm using the latest available DAVx⁵ version.

Steps to reproduce

1. Setup account with caldav.gmx.net
2. Set past event time limit to 400 days
3. Create an event in the far future (ie. on 1.1.2026)

Actual result

The event is created but not shown in the local calendar.

Expected result

The event is created but and shows in the local calendar.

Further info

• changing the amount of "past event time limit" days to a smaller number, ie 50, will trigger a re-sync and make the event show up again.
• Exact number of "past event time limit" days and how far the event needs to be in the future, to not show up anymore, are still unknown.
• May not be specific to GMX.

Originally posted by @pcjogi in #863

[devvv4ever]

Please note that Synology has a similar problem with larger numbers for the past time event limit. Many servers do not support the FILTER method for higher values. And I remember that gmx is not delivering events to (at least CalDAV) clients if they are far in the future.

[rfc2822]

Yes, closing because as far as I know that's a GMX problem. Please re-open if it's related to DAVx5.