Which day do I count?

Ashlee

Yesterday CD 15 I got my first solid smiley after 4days 🤗🤗

Today CD 16 I got my first true no doubt about it positive test strips. I was told by other ladies the clearblue would detect surge sooner than strips and that my strips should be positive today which they were so would ovulation occur 12-36 hrs from today or 12-36 hrs from my solid smiley yesterday?