Essential for anyone who wants to be able to use Proton Calendar for commercial work. The tool is not offering functionality for booking slots, so one has to go with tings like SimplyMeetme or Calendly and it's super inconvenient not to be able to integrate those tools.

I'm also very interested in Proton's CalDAV support. This could be useful for many users.

Yes please. It is a serious hindrance that I can't integrate Proton Calendar with my calendar clients. Perhaps there could be a security solution via the existing Bridge app?

My main calendar is on my self hosted nextcloud, it would be amazing if I could sync that with the Proton Calendar app. I mean, we can already connect and sync google, why not add caldav there as well?

The vast majority of students and professionals will not be able to choose their school/work email provider, and the vast majority of them will want their email and calendar to be visible in the same app. That isn't possible in Proton Calendar, though, at least without forwarding all of your mail to a ProtonMail address, which may not be possible for some users, and which is a pain for the rest. As a result, very few people in that bucket are going to use Proton Calendar even if they use ProtonMail for their personal email. Maybe you'll get a few retirees and serious privacy wonks, but you'll miss the normies.

The solution is interoperability with other mail clients, and you can only do that via widely accepted standards. CalDAV support is therefore essential for this app.

Impossible to de-google myself entirely if I cannot connect my proton calendar to my android preferred calendar app

Yes, CarDAV & CalDAV were never designed to be end-to-end encrypted.

But they are standards, and so far the best ones we've got.

The impossibility to connect my Proton Calendar with my calendar client of choice means in practice that I never use Proton Calendar (nor Proton Contacts). So, so far, they are useless to me.

I understand the privacy risk or hole. But I still prefer keeping my info in Proton's servers as in other data-hungry companies' servers.

Please support this feature! <3

Albeit Calendar making its way into the Mail desktop app, I have to remain on browser for Calendar as I need a standalone Calendar app that is accessible:

1. In parallel to the Mail app
2. One click away

This feature is absolutely critical for any proton calendar adoption worth talking about. Otherwise, proton will need to reproduce every feature themselves. By allowing CalDAV access, you can use your preferred client with all the features you like.

Please! I would LOVE to use Proton Calendar with Thunderbird so I could ditch iCloud! I don't care if it requires the bridge.

I would really like to use the Proton Calendar, but without CalDAV support, there is no way that I would pay for Proton Calendar. And yes, I am paying for other Proton services already.

Bitte Caldav implementieren, ist wichtig für die Kalenderpflege Plattformübergreifend

Leider bin ich immer noch gezwungen, Kalender von Anbietern zu verwenden, welche nur CalDav unterstützen.
Die Unterstützung von CalDav bei Proton würde mir ermöglichen, den Proton-Kalender endlich als Hauptkalender zu nutzen. Solange dies nicht geht, muss ich den Google-Kalender benützen, was ich eigentlich nicht mehr möchte.

Just quoting from Proton's recent blog post:

"Standardization is important for two reasons. The first is that Proton remains committed to the open web. Email is one of the most successful open standards that has ever existed, and a core part of that success is interoperability."

There may be some duplicates

https://protonmail.uservoice.com/forums/932842-proton-calendar/suggestions/44345181-calendar-integration

https://protonmail.uservoice.com/forums/932842-proton-calendar/suggestions/45489391-add-caldav-accounts-to-proton-calendar

Isn't this duplicate to https://protonmail.uservoice.com/forums/932842-proton-calendar/suggestions/42558538-caldav-and-carddav ?

This is a reasonably critical issue for me since I rely heavily on my calendar in daily life. I need to sync the calendar across mobile and desktop. I'm considering whether or not to renew my Protonmail subscription without this feature.

I am already using the Proton Mail Bridge to use my favorite MUA; if CalDav could be integrated into that existing - and perfectly working! - product, that'd be really great.

I agree! I need it to be able to synchronize my proton calendar with the obsidian. That would be great, please make it possible

I love the security of ProtonMail, and the UI for email and the calendar are very user-friendly. However, I have found the lack of CalDav support to bring all my calendars together in one place makes the service unusable. When my subscription is up, I'll begrudgingly move over to iCloud.