A pair of twins born in Indiana on New Year's Eve is now the subject of bar trivia that will last the rest of their lives: the twin boy and girl will be able to claim they were born in different decades. That’s because their mother gave birth to them 30 minutes apart, right around midnight.

According to Indianapolis news outlet RTV6, Joslyn Grace Guilen Tello arrived at 11:37 p.m. on December 31, 2019. Her brother Jaxon DeWayne Mills Tello followed at 12:07 a.m. on January 1, 2020. The event occurred at Ascension St. Vincent Carmel Hospital in Carmel, leaving their mother Dawn Gilliam and father Jason Tello in a state of surprise. The twins weren’t due for another seven weeks.

This isn’t the first time a rolling calendar has created unusual birth circumstances. In 2018, Joaquin Jr. Ontiveros was born at 11:58 p.m. on New Year’s Eve in Delano, California, with sister Aitana de Jesus Ontiveros coming 18 minutes later in 2019, giving them two different birth years. In 2016, Samuel and Ronan Peterson were born in Cape Cod Hospital in Massachusetts just as Daylight Savings Time was taking effect. Samuel arrived at 1:39 a.m., with Ronan coming at 2:10. But because the time change kicked in at a 2 a.m., it was really 1:10 a.m., making him the older brother despite being born later.

[h/t RTV6]