My bracket popped off, but is still attached to the wire, can i cut the band and take the bracket off the wire till i get to the dentist?

Leave if possible: It's probably easier and safer for you just to leave everything as it is and see your orthodontist first thing on monday.

Dangerous to cut: Please do not take anything sharp to you mouth, you could accidentally cause serious damage. If it bothers you, try placing soft dental orthodontic wax over the bracket. This may help to temporarily secure it. Call the dentist/orthodontist, possibly they can see you on an emergency basis.

You Could..Carefully: If the loose bracket isn't bothering you, just leave it attached to the wire. If you can't get in to see your dentist/orthodontist, you can CAREFULLY try to remove the tiny rubber band around the bracket and remove the loose bracket. However, don't cut yourself! Also, don't pull on the bracket too hard, or you might dislodge neighboring brackets or bend the wire. Ideally, have your dentist do it.