Let's say hypothetically speaking…
You work Mon-thurs and Saturday. Your days off are Friday and Sunday.
Your job has paid holidays on some holidays like Christmas, Thanksgiving, Independence Day, etc.
Oh hey, independence day is just around the corner! That means you'll be getting two days off, right?
Lol, no. Now you have Thursday off but you have to come in Friday because we gave you a paid holiday on Thursday. If you don't show up, you'll lose your paid holiday and be written up for calling out.