How to delete old entries


I use Nextcloud since five years ago, and i was wandering if there is a way to delete old appointement in calendar ?
I have one calendar for each family member, but with this many years ago it made a fat files when i export it.

Is there a way to simply delete old event more than 1 month for example ?

Thanks for you help :slight_smile:

(Nextcloud 20.0.7).