"Usually, Monday - Friday gets up at 5:30, Saturdays and Sundays at 7:00, and holidays get up at 7:00, but I want to wake up at 6:30 especially for the 3 days from the day after tomorrow."
In such a case, it is quite troublesome only with Android ALARM CLOCK. You shall change the alarm settings every day.
Alarm time can be set in three modes with "Holiday Alarm Clock Manager".
WEEK : This is a so-called normal alarm setting.
CALENDAR : Specify national holidays etc from Google Calendar. If you have Alternate calendar in Google Calendar, you could also choose overseas holidays.
DATE specification : You can set an alarm by specific date.

For CALENDAR and DATE specification, the alarm time can be set to "Silent".
All other alarm will be skipped, if today is "Silent" mode.
The order of setting priority is DATE > CALENDAR > WEEK.
"Usually, holidays are "Silent", but tomorrow I will go on a trip so wake up at 6:00" can be done.

This app is designed to launch from a widget. Please make widget for this app on your home screen.