Birthday boy Nowitzki doesn't need to be reminded of his age

Today is Dirk Nowitzki's 39th birthday!

... But feel free to leave out the number when sending him your well wishes.

The legendary Dallas Mavericks big man has made a habit of taking to Twitter to crack jokes at his expense as he ages and slows down. He did it again Monday to celebrate turning 39 years young.

Related: Nowitzki leaps at another opportunity to make fun of his regression

Birthday boy Nowitzki doesn't need to be reminded of his age
  Got something to say? Leave a comment below!
LBJ taking control
LeBron James is taking over in Cleveland! 😤 #AllForOne
Myles Turner dunks Cheick Diallo into next week
Myles ahead
OH MYLES! 😱😱😱😱😱😱😱😱
Rejection, spelled Greek
The Greek Freak says NOPE! 🚫
Lowry finishes 1st half with 4 treys
Lowry buries his 4th triple of the 1st half! #WeTheNorth 📺: @ESPNNBA
Pelicans to give away ponchos vs. Pacers after original game postponed due to leak
That being said, the first 5,000 fans in attendance tonight will receive a #Pelicans poncho courtesy of @SmoothieKing! 😉
LeBron's new school approved by Ohio Department of Education
That face @kingjames makes when he sees that The I PROMISE School has been approved by the Ohio Department of Education 😃 We’re moving...
Kawhi ... is that you?
This basketball robot has a better free-throw percentage than LeBron — and just beat two professional players in a shoot off
LeBron has clearly scouted Raptors' entire roster
Here's LeBron James listing off his Raptors prey. Help.