On the 내 캘린더 page, select a calendar you wish enable alarms for.
Click 편집.
Click the tab 알람 and adjust the alarm settings as you like.
Click 저장.
On the home screen of the device, tap Calendar.
Turn the device to portrait orientation, scroll down to Calendar and tap it.
Look for the calendar you wish to unsubscribe and tap on the icon beside it.
Make sure Event Alerts is ON. Finally, tap Done in the top right corner.
Updated 8 Feb 2023