Imagine that in cell A1 you have the first day of the month. I need a formula that finds if the 16th day of that month falls on a weekend (Saturday or Sunday) and if that is the case, return the date of the following Monday. If the 16th is not on a weekend, it will just return the date of the 16th

```
=If( (A1 + 15) = Saturday or Sunday, Date of the next Monday, (A1 + 15) )

```

I apologize in advance for my formula being terrible, I'm at a loss on this one. 
For example, if A1 = "10/1/2019" then the forula will return 10/16/2019 because the 16th is not a weekend. However, is A1 = "11/1/2019" then the formula will return 11/18/2019 because the 16th is a Saturday. Thanks!