Fantastical 2 - Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.
Google Calendar - Spend less time managing your day & more time enjoying it
Calendars 5 - Calendars 5 seamlessly syncs with local iOS calendars, Reminders and even Google Calendar.
Cozi - Cozi | Must-have app for the modern family
Itsycal - Itsycal for Mac. Itsycal is a tiny menu bar calendar. If you want, it will display your events as a companion to the Mac Calendar app. You can also create and delete (but not edit) events. Download Itsycal for macOS 10.
WAVE Calendar - WAVE Calendar is a revolutionary app, which is designed to bring balance to your life