Keep everyone in the loop with #[0]'s new sharing feature! Share your calendars with coworkers, family members, and friends who use @ProtonPrivacy. Set viewing or editing rights and easily plan your shared events.
Learn more in our blog post: 
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Keep everyone in the loop with shared calendars | Proton Calendar | Proton
Shared calendars make planning events together easier without sacrificing your privacy. Learn how to share calendars with Proton users.