What date do we use?

Cheyenne • Mommy to be 🤱🏼 Baby boy due December 👶🏼💙

So baby daddy and I broke up because we needed to get our shit together and figure out what we want. We want to get back together but still need a few weeks to set our minds straight. Our one year anniversary is October 17th we are pregnant but broken up when we do decide to get back together do we consider our relationship brand new or do we still use our date we decided to start our relationship in the first place?