Ovulation testing!

Brittany • Mama to 2 girls! 💗 🤰🏼 with number 3!
This is my first month TTC... When is it a good time to take the clear blue ovulation kit? Meaning what time of day. I am not supposed to ovulate until the 23rd but I do have a irregular period, I was going to start testing everyday on Monday so I don't miss it.