Google Calendar - Spend less time managing your day & more time enjoying it
Fantastical 2 - Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.
Rainlendar - Rainlendar - Customizable desktop calendar
BusyCal - powerful calendar app for macOS
Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
Superpowered - Power through the day without your calendar