How do I handle this $ with new tenants going to be moving in?

[Bryan Findlay]

We have a rental property that's ready to be rented August 1st 2020.  We have found qualified tenants, however, they would not be able to move into our rental until the August 18th 2020.  I have always kept it simple in that rent is due on the 1st of each month along with full deposit. I don't want to loose them or be unreasonable by charging them from the 1st of the month, although, I'm sure I could as this was how it's advertised.  I dont want to be unreasonable either and charge them full months rent when they wont be here. At the same time, I don't want to loose out money on the days from the 1st-18th. H

How do I handle this so that these tenants will still be paying rent for future dates on the 1st of each month?  Do I just charge them for the 1st of August when they wont be living here?  I don't feel like this would be good, but then again everyone has various opinions. THese people were very qualified and i am okay with being reasonable but how do I not loose out on money and not make this complicated?  

The new perspective tenants seem reasonable and are asking "what do we need to do."  I would like to require at a minimum the deposit, to lock down the home from them in addtion to charging them rent from the 15th =30TH (pro rated) and having SEPT 1st be first full rent payment due?