California twins born in different years

BAKERSFIELD, Calif. (KGET) — Maria Flores and her brand new babies have already done a lot this year.
At 11:58 P.M. on the last day of 2017, Flores delivered the first of her twins, Joaquin Jr. Ontiveros. He was the last baby born in 2017 in Kern County, California.
And at 12:16 A.M., Flores had the second of the twins. Baby girl Aitana de Jesus Ontiveros was the first baby born in 2018 in Kern County.
The twins are separated by only 18 minutes on the clock, but a