Serena Williams and husband Alexis Ohanian elated over daughter’s first birthday

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“1 year ago today, you changed our lives forever, @olympiaohanian my adventure princess, the Reddit co-founder wrote on Instagram.

1 year ago today, you changed our lives forever, @olympiaohanian ? my adventure princess.

A post shared by Alexis Ohanian Sr. (@alexisohanian) on Sep 1, 2018 at 3:37pm PDT

But Olympia’s birthday celebration had much more to do about basking in the joy of the year passing by than it did about cake or a big party. Williams explained during a press conference for the U.S. Open, that “Olympia doesn’t celebrate birthdays. We’re Jehovah’s Witnesses, so we don’t do that,” PEOPLE reports.

There’s a lot to celebrate in the Ohanian household this month especially after Williams defeated sister Venus Williams in a U.S. Open showdown, she then hit 18 aces and beat Kaia Kanepi 6-0, 4-6, 6-3 to advance to the quarterfinals for the 15th time.

Ohanian doesn’t mind the extra attention he’s been getting because of his talented wife and told ABC’s “Good Morning America” earlier this year: “There’s probably a lot of guys who would feel threatened in a situation with a partner who is extremely talented and successful. It seems kind of absurd to me, though, because all of that success and all of that greatness is something that you should be championing.”

And he does. When he was recently flagged down by two women who seemed to be Serena fans, he recorded them so they could personally send her a message of support.

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Usually I’m stopped on the street to get pitched a startup someone wants @initialized to invest in. The last two weeks, they all just want me to pass along a message to my wife. Cant say I hate it. #usopen

A post shared by Alexis Ohanian Sr. (@alexisohanian) on Aug 31, 2018 at 5:43am PDT

After many health struggles and overcoming postpartum depression in the first months of being a new mom, Williams is certainly conquering motherhood. It is also keeping the champion tennis player on her toes. She wrote last week in her own Instagram message:

Kids humble us. The other day on a flight home Olympia had so much energy and insisted on running up and down the aisle. When I finally got her to calm down and sit still, she threw up all over me and in the aisle. #ThisMama wants to remind all mothers the importance of supporting one another through the highs, lows, laughs and tears. _ Share your own stories of motherhood with hashtag #ThisMama. I’d love to hear them!

A post shared by Serena Williams (@serenawilliams) on Aug 26, 2018 at 1:12pm PDT