Step 1
On the マイカレンダー page, select a calendar you wish disable alarms for.
Click 編集.
How do I disable alarms?
Alarms can be disabled either by having the iOS Calendar application remove them, or by disabling them at WebCal.Guru. This process shows how they are disabled from the subscription at WebCal.Guru.
Note that disabling the alarms can be done with any device.
Step 2
Click the tab アラーム and set both alarm settings to なし.
Step 3
Click 保存.
The new settings take effect the next time your application downloads the calendar data, usually within a day or so.
Updated 8 Feb 2023