This would be useful for many: Can this be done with an 'If, Then' conditional formatting?

[Trismos]

Hello

I have attached a calendar that I downloaded which already has formulas in it to advance the calendar days to match the year entered into the first cell. I can remove this if this is the only obstacle to what I'm looking to do.
I do inspections and for the properties noted in the calendar on sheet C6 and N7 I have filled scheduled dates in in green. I would like to have these dates automatically show up in Yellow on all the other sheets. You see where I'm going then: I would only have to look at one sheet really and I could tell what dates are free and what has been scheduled. Can this be done?

Thx
Dave