Rainlendar - Rainlendar - Customizable desktop calendar
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.
Date Reminder - Date Reminder reminds you of recurring or nonrecurring events, like birthdays, bills to pay...
Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
Reminder Commander - Reminder manager that reminds you about important events in advance.