Sophoslat
You should test ... test ... test it with many combination of Off Hrs as well as with those Holidays.
After that, You could know - do it works as it should work.
There would be some more features, which would help You.
It's You - who knows - what do You need more or something different?
> Sheets are protected that there could use only needed things.
As above test ... test ... test.
You do not need password now.