Hey there Matthew and welcome to planDisney! 
I know you must be so excited as your February visit to The Most Magical Place on Earth approaches. Of course, you'll want that
 MagicBand in top form so all of your pixie dust dreams can come true. 
MagicBands have a lifespan of about 2 years. If you purchased yours in 2021 you ought to still be good to go for your February 2023 visit. In my personal experience, I've used my MagicBands for several years without issue. 
Pro-tip: If you're feeling inclined to add another piece to your MagicBand collection, consider upgrading to the 
MagicBand+. In addition to all of a traditional MagicBand's normal abilities, these new options enable Guests to jump right into the magic by interacting with the 
Disney Fab 50 Character Collection statues around the parks, becoming a part of nighttime spectaculars like 
Harmonious in EPCOT, and so much more. 
Matthew, have the best time ever on your magical vacation. If you have any other questions, please feel free to 
ask me. We're here to help!
Happy planning!
Taylor