Fans went on to trend #HappyJaeHyunDay on Twitter wishing NCT's Jaehyun a very special birthday!

Celebrating his 21st birthday (22nd in Korea) on February 14 KST, fans congratulated the idol star and wished him a happy birthday/Valentine's Day, posting numerous photos, video footage, and much more.

Happy birthday Jaehyun!

you’ll always be my #1 and this year it’ll be a pleasure to see you succeed and achieve all of your goals and dreams ;
→ #HappyJaehyunDay pic.twitter.com/qwkhvuSykP

— jaehyun pics #BOSS (@jaehyunspics) February 13, 2018