This is a very basic feature that is glaringly absent from Proton Calendar and absolutely needs to be added.

Yes, please!!

I was surprised and hugely disappointed to find this wasn't possible when I set my account up. To me this is basic; I have several calendars that I copied over and it's a mess. I had them listed in order of use and now I have to do a massive sort out in order to be able to use Proton properly. That and the abrasive calendar colours are almost enough to put me off!

This is so basic, but so critical! I can rearrange my folders in Mail just fine, and it made me so mad when I couldn't easily do the same with my calendars! I had to delete and input them again in the order I wanted.

Please add this basic function.
It is inconvenient to have calendars sorted by creation time.
Moreover, in the Android app when adding an event all calendars are in a random order, making it difficult to search for the right one. I've already flagged this bug more than 1 year ago.

I was surprised when I found out it is not possible. We can order labels and folders in Proton Mail.

I actually had to delete ALL my calendars and add them back in the order I wanted to see. It was a hassle but at the end I got the result I wanted.

This is kind of a basic feature, being able to reorder things.

Please add this.

Please! I just tried to do this. The calendars seem to be in random order.
Ordering them myself would be very good.
Even alphabetical would be more useful than random.
Please.

This is one of the features why I am not sure whether I want to use premium Proton Calendar or Proton Unlimited... If I use several calendars for different projects I want to be able to sort them. This allows me to access what I want quickly, as well as display or hide different calendars in an easy way depending on what I am working with.

This is very important to important to me I have many sub calendars to organize. I use planetary transits and they take up so much space. I would like to toggle on and off and reorganize my calendars the way I want to look at them. I was moving my google calendar first, since it is the least complex, now it holds the top spaces and is the least important.

customize order of calendars in ProtonCalendar...
self explanatory - ProtonMail has these features already, so I suppose analogous changes should not be too time consuming to implement them properly.

ps: also, share only a time window of calendars, not all or nothing.