Change preferences in Reminders on Mac
Use Reminders Preferences to set the default reminder list and preferences for all-day reminders.
To change these preferences in the Reminders app on your Mac, choose Reminders > Preferences.
Click the pop-up menu, then choose a list.
To set a time to be reminded about all-day reminders, select the Today Notification checkbox, then enter the time you want to be reminded.
To show all-day reminders as overdue starting on the next day, select the “Show all-day reminders as overdue” checkbox.
Select Mute Notifications to turn off notifications for tasks assigned to you in a shared list.