"National Siblings Day" may not get the same federal recognition as Mother's Day or Father's Day, but Michelle Obama is still sharing the sibling love.

The First Lady's twitter feed this morning featured a photo of a pigtailed Michelle and her older brother, Craig Robinson, now 51, snuggling as children:

Happy #NationalSiblingsDay! #TBT #ThrowbackThursday pic.twitter.com/SROglf91eP

— The First Lady (@FLOTUS) April 10, 2014

Cue the collective "aw."

Mrs. Obama's acknowledgement of the quasi-holiday is seen as an exciting development in the quest for official federal recognition.

The holiday received presidential "messages" from Bill Clinton in 2000 and George W. Bush in 2008, but has never been able to garner a presidential proclamation, which is required in order to establish a national holiday.

"It's amazing … that she acknowledged it," said Claudia Evart, founder of the Siblings Day Foundation, which has been pushing for a proclamation since 1997. "Now we're just waiting for her husband to do something."