The twins were born in September and with their arrival, Buttigieg became the first Senate-confirmed U.S. Cabinet that is a gay parent.
After posting a photo following the birth, the Buttigiegs posted a photo of the family celebrating Halloween in the hospital.
Joseph August had been hospitalized for a respiratory virus unrelated to the virus at the center of the ongoing global pandemic. "Sending best wishes for a Merry Christmas from our family to yours!" Pete Buttigieg wrote to Instagram and Twitter with a photo of the family nearby a Christmas tree.
The celebration comes at the end of a successful year for Pete Buttigieg. After getting sworn in as Secretary of Transportation, he has stayed in the forefront.