How to Hide Personal Calendar Events from Coworkers

Why Your Coworkers Can See Your Personal Calendar

If you sync your personal Google Calendar to your work Outlook (or the other way around), there is a good chance your coworkers can see exactly what you are doing. "Dentist at 2pm" or "Interview at CompanyX" showing up on your work calendar is not ideal.

The problem is most calendar sharing methods copy everything, including event titles and descriptions. That is fine for work meetings but terrible for personal stuff.

The Busy Block Approach

The fix is simple in concept: instead of syncing the full event, you sync a "Busy" block. Your coworkers see that you are unavailable from 2-3pm, but they do not see why. No event title, no description, no location. Just "Busy."

This is sometimes called "free/busy sharing" and most calendar platforms support some version of it natively. The problem is the native options are clunky and unreliable.

How to Set This Up

Option 1: Google Calendar's Built-in Sharing

In Google Calendar, you can share your calendar with "See only free/busy" permissions. The downside is this only works within Google. If your work uses Outlook, this does not help.

Option 2: Outlook's Publishing

Outlook lets you publish a free/busy URL. Same issue though. It is one-directional and does not update in real time. Changes can take hours to appear.

Option 3: Use a Sync Tool with Blocker Mode

Tools like CalendarSync have a dedicated "Blocker mode" that creates Busy blocks automatically. You connect both calendars, turn on Blocker mode, and every personal event shows up as a simple Busy block on your work calendar, within seconds on Google and Outlook (Pro and the trial), and in both directions if you want (two-way is part of Pro).

This is the approach that actually works reliably across Google and Outlook without you having to think about it. For a broader view of the tradeoffs between sharing full details and hiding them, see our post on syncing work and personal calendars without sharing details.

What About Specific Events You Do Want to Share?

Sometimes you want most events blocked but a few shared with full details. CalendarSync's keyword filter (Pro) syncs only the events whose title contains a word you choose, such as "team". It applies to a whole sync pair in that pair's mode, and two calendars share one pair, so for each pair you choose: block every event, or mirror only the matching ones. For a personal calendar, keep Blocker with no filter.

The Bottom Line

You should not have to choose between keeping coworkers informed about your availability and keeping your personal life private. Busy blocks solve this perfectly, and if one-way sync is the better fit, our guide on one-way vs two-way calendar sync explains when to use each.

Try CalendarSync's Blocker mode free for 7 days and keep your personal calendar private.