Last Christmas my outside outlets stopped working after 3 days. This year I tried resetting all of the GFCI outlets in the house but this doesn't help. There is not a switch to turn the outlets on or off. I do not have a basement but is it possible the reset is in the garage? I went to the main breaker on the side of the house but do not see anything listed as outdoor outlets. Any help would be valuable.

GFCI can be a receptacle or it can be a breaker. If it's a breaker it will look different from the rest, usually has a test button. If it's a receptacle it too will have a reset/test button and you will likely have only one GFCI receptacle that protects all others down stream. Your GFCI in the home are likely bathroom. Laundry and kitchen, they are not part of the outside lighting 99% of the time.