18720 minutes is 13 days
I have set up mine as
2 days - 1 minute = 2879 minutes
I have a lot of daily repeating events
Caldav complains if it doesn’t the the next repeat on preload but also complains if it sees more than one repeat.
Therefore 2 days to capture the next repeat less one minute to avoid capture the second one. If that makes sense.
If I also had weekly repeating events I would put them in another calendar and set the preload at 8 days. That should do it.
Why another calendar? I just don’t like warning messages in my log…