What is 2calendars and how does it work?

What is 2calendars?

2calendars is a privacy-first calendar synchronization service. It mirrors events between your Google Calendar accounts automatically and in real time, so your availability is always accurate across every calendar you use.

How it works

When you create an event on one calendar, 2calendars detects the change within seconds and creates a corresponding block on your other calendar. By default, mirrored events appear as “Busy” — no title, no description, no attendees, no location. Just a block of time.

This means your work calendar knows you are unavailable during a personal appointment, and your personal calendar knows you are in a meeting — without revealing any details.

Key concepts

• Connection — A link between two calendars that defines how events are mirrored. You can have one-way or two-way connections.
• Source calendar — The calendar where the original event lives.
• Destination calendar — The calendar where the mirrored block is created.
• Busy block — The default mirrored event, showing only that you are unavailable.

Who is it for?

2calendars is built for anyone who manages separate calendars for different parts of their life:

• Freelancers juggling multiple clients
• Working parents balancing family and office schedules
• Side-business builders keeping their day job and evening projects separate

Getting started

To start syncing, you need at least two Google Calendar accounts. Connect them to 2calendars, create a sync connection, and your availability stays accurate from that point forward.

See our step-by-step guides for connecting accounts and creating your first connection.