A new dad from Brooklyn Heights learned Saturday that you can fight City Hall — with help from a baby-doctor’s note.

It took three months, but artist Brian Leo finally successfully appealed an outrageous, $65 alternate-side parking ticket for failing to move his car while his son, Max, was born.

“One of the three judges said ‘congratulations’ for the baby on my way out,” Leo said of his Aug. 16 appeals hearing at the city Department of Finance’s Parking Violations office on John Street in Lower Manhattan.

Leo received notice on Saturday that his appeal had been approved.

“Now I have to wait to get my $65 back,” Leo, a painter, told The Post Saturday during a break from installing his artwork at the Governor’s Island Art Fair.

“It’s for some extra baby formula,” he joked of the refund.

Hopefully, the refund will come before Max is in Kindergarten.

Additional reporting by Laura Italiano