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Identical twin sisters have given birth on the same day, at the same time, in their respective time zones.

Today.com reports Sarah Mariuz and Leah Rodgers delivered their babies at 1:18 a.m. Thursday. Rodgers’ son, Reid Joseph, was born first, on Mountain time in Denver. An hour later, Mariuz delivered her daughter, Samantha Lynne, on Pacific time in La Jolla, California.

The 35-year-old sisters hadn’t planned to be pregnant at the same time but ended up with due dates just four days apart.

The sisters and their babies are both doing well. Today.com reports that the families are trying to work out a time to visit each other.

Identical twin sisters give birth on same day at exact same time! https://t.co/mJtZtLfmSQ pic.twitter.com/BDY9hb8XYR — TODAY (@TODAYshow) July 5, 2016