for setting, you need to pick a place that is suitable for the person’s birthday. If it’s kids birthday, you might want to pick outdoor location for the kids to play or you can just pick indoor location like your house, or a venue and it can also depend on the weather. If it’s gonna rain or snow you want to pick an indoor location. The day is a very big factor because you don’t want to pick a day when everyone is working. It’s usually best if you do it on the weekend because almost everyone is off that.