busycal

Install command: 
brew install --cask busycal

Name: BusyCal

Calendar software focusing on flexibility and reliability

https://busymac.com/busycal/index.html

Development: Pull requests

Cask JSON API: /api/cask/busycal.json

Cask code: busycal.rb on GitHub

Current version: 2026.3.1,2026-08-02-11-55

Requirements: macOS

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