With day counts as “ovulation day”?

Je

Trying to figure out which day counts as your “ovulation day,” and then which day starts DPO. Most of my apps say today, but I had my first positive test on Friday evening, and had my peak a few hours later (give or take) around midnight Friday night. I had positives most of the day yesterday as well. The red line on the second chart is LH tests and the blue line is my bbt.

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