Calendr is a free, open-source calendar that lives in your Mac menu bar. It lets you check dates and upcoming events without opening the Calendar app, and you can add new events by simply typing a sentence. It is built with Swift and released under the MIT license.

Key Features

• Menu Bar Calendar: See your calendar with one click, right from the top of your screen.
• Natural-Language Event Entry: Type something like "Pickleball with Tom next Friday from 10 to 12" and Calendr fills in the date, time, and duration for you, then removes those instructions from the saved event title.
• Smart Date and Time Words: Use words like today, tomorrow, next Friday, at 2pm, in 2 hours, for 30 minutes, or all day.
• Pick a Calendar by Typing: Add a slash and part of a calendar name, such as /sport, to choose which calendar the event goes into.
• Multiple Time Zones: Show more than one time zone in your menu bar, like 15:00 | 17:00 LT | 12:00 BR, using a custom format.
• Open a Date With a URL: Use the calendr://date/ link format to jump straight to a date, such as calendr://date/feb%2010%202025.
• Free and Open Source: Calendr costs nothing, and its code is public on GitHub.

Frequently Asked Questions (FAQ)

Is Calendr free?

Yes. Calendr is completely free and open source under the MIT license. The developer accepts optional donations if you want to support the project.

How do I install Calendr?

You can install it with Homebrew using the command brew install --cask calendr, or download it from the GitHub releases page.

What macOS version does Calendr need?

The latest versions of Calendr need macOS 15 or later, and it runs on both Apple Silicon and Intel Macs.

What languages does natural-language event entry support?

It supports English and Czech. It follows Calendr's preferred language automatically, and you can turn the feature on or off in Settings.

Can Calendr show more than one time zone?

Yes. You can set a custom menu bar format that shows several time zones at once, each with its own label.

What is the difference between Calendr and Itsycal?

Both are free, open-source menu bar calendars. Itsycal is a minimal, tiny calendar, while Calendr adds extras like natural-language event entry and multiple time zones in the menu bar.