All events can be found here: https://www.si.edu/events I'm not sure if anything "special" is going on, looks pretty standard to me, but that link will show you everything going on by day.
There's always something going on in the immediate area. There are several museums to enjoy as well.
I haven't been there since last year but all the museums are free, beautiful, historical and soooooooo much to see!
There was a marvel exhibit but it may be over bit it still a cool place to go see.
The museum is worth anyway
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