President Obama, left, and Nick Reck, a Senate intern, right. If being 50 in Washington equates to wisdom, experience and stature, what does it mean to be a 20-something intern? Share your aging story below. (CHIP SOMODEVILLA/GETTY IMAGES; DAYNA SMITH/POST)

Your birthday.

President Obama turns 50 on Thursday, Aug. 4. In Washington, that’s an age that means wisdom, experience and stature. But with each milestone birthday celebrated in the shadow of the Capitol, Washingtonians can celebrate what they gain, whether that’s measured in political victories, personal growth or professional development. So what makes a milestone birthday especially meaningful in Washington?

Tell us your story of turning 20, 30, 40 or more in D.C.: What you’d do differently, and what you’ve learned since.

And because birthdays aren’t always the happiest of celebrations, vote on which decade is the worst to spend in D.C. Will it be the 50s for Obama? We’ll find out in 2012.

Share your stories after the jump.