CASTLE ROCK, Colo. – Move over Boomers. Step aside Millennials. There’s a new generation in town! As 2025 begins, so does a new generation known as Generation Beta. At AdventHealth in Castle Rock, new parents Meg and Bradley Gibas are ringing in the new year as new parents. Their daughter, Mirielle Jane, was born at 7:12 a.m. She is first child to be born at the Castle Rock hospital this year.