Use Siri Suggestions in Calendar on Mac
When Siri recognizes events in apps such as Mail, it adds them to your Siri Suggestions calendar. You can delete events from the Siri Suggestions calendar, or confirm an event by moving it to one of your other calendars. You can also turn the Siri Suggestions calendar on or off.
Turn the Siri Suggestions calendar on or off
On your Mac, choose Apple menu > System Settings, then click Siri & Spotlight in the sidebar. (You may need to scroll down.)
Click the Siri Suggestions & Privacy button, then choose Calendar in the list on the left.
Turn “Show Siri Suggestions in applications” on or off.
When you turn off the Siri Suggestions calendar, any unconfirmed event suggestions are deleted and the Siri Suggestions calendar is hidden.
Confirm or remove events found by Siri
Event details from known providers that you receive in other apps, such as Mail, automatically appear in Calendar as suggested events. They’re placed in the Siri Suggestions calendar, which is located in the Other section of the calendar list. For example, a suggested event appears when you receive a Mail message containing details about a flight, restaurant reservation, car rental, or similar event from known providers.
To confirm a suggested event, add it to another calendar in the list.
In the Calendar app on your Mac, find the suggested event in your Siri Suggestions calendar by doing one of the following:
On your calendar: Look for the suggested event at the proposed date and time, then double-click the event, or force click it, to open its info window. If you don’t see the suggested event, you can search for it.
In the notifications list: Click the Notifications button in the toolbar, click New at the top of the notifications list, then find the suggested event in Siri Suggestions.
Add the suggested event to another calendar, or remove it, by doing one of the following:
Add it to your default calendar: Click Add to Calendar.
Add it to another calendar using the event info window: Click the pop-up menu in the upper-right corner of the window, then choose a calendar.
Add it to another calendar using the notifications list: Click and hold Add to Calendar, then choose a calendar.
Remove it: Click Ignore.