Activate a flow every 1st day of the month?

I would can I activate a flow every first day of the month?
I would like to use this to reset the value in my Neo Cool am power plugs.

AND (date and time) day number is 1 ?

Sure, but what’s the trigger?
Every day? Then when will to do that? at 00.00hrs?
Or every Hour? But isn’t it then quite a load on the system which is inefficient for something to be executed every month?

WHEN time is 00:05. He need to reset just once.
Will trigger every day just once so.


An alternative to Roco’s fine solution:
This should work, but I’ve no info about the time it triggers. My guess is it triggers at the moment when the date & month changes, just after midnight.