Mark Zuckerberg Credit: Luis Gene/AFP/Getty Images

It’s time to get back to work! Mark Zuckerberg came to the end of his two-month paternity leave on Monday, January 25, and celebrated the occasion with a funny Facebook photo. 

“First day back after paternity leave. What should I wear?” Zuckerberg captioned the pic of identical gray T-shirts and navy zip-up hoodies. He added the confused face emoji with the note “feeling undecided.”

The go-to outfit has become practically trademark for the Facebook founder, who was portrayed on the big screen by Jesse Eisenberg in 2010’s The Social Network. Wardrobe choices aside, paternity leave was a very important decision for the tech mogul, and one that he shared with his followers prior to his daughter’s arrival.

First day back after paternity leave. What should I wear?

Posted by Mark Zuckerberg on Monday, January 25, 2016

“Studies show that when working parents take time to be with their newborns, outcomes are better for the children and families,” Zuckerberg explained on Facebook in November 2015. “At Facebook we offer our US employees up to 4 months of paid maternity or paternity leave which they can take throughout the year.”

Zuckerberg and his wife, Priscilla, welcomed their daughter, Max, on December 1, meaning his paternity leave lasted just under two months. To announce Max’s birth, Zuckerberg penned a letter to his daughter, revealing that he and Priscilla were donating 99 percent of their Facebook shares (worth about $45 billion) throughout the course of their lives “to join many others in improving this world for the next generation.”

In his “downtime,” the billionaire has been happily sharing photos of his newborn.

On January 8, he caused a stir when he posted a photo of himself holding his baby girl with the caption, “Doctor’s visit -- time for vaccines!”

Doctor's visit -- time for vaccines!

Posted by Mark Zuckerberg on Friday, January 8, 2016

Not all of the new dad's pics are controversial. He's also posted one of his little girl dressed up like a Jedi, and another from her first swimming lesson. 

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