When is DPO 1?

Danielle • Mama to my rainbow 🌈 👶🏻 TTC #2

hey ladies..took an OPK yesterday evening and got a blazing positive and then again this morning ( not FMU) and it was another positive. I have had a lot of EGCM this morning already as well. Would you consider today ovulation and tomorrow DPO 1?

Better pic from the AM test