If I understood you and the information well, the day of the start of the relationship doesn’t co-rule the relationship? Only the meeting and the first day of lovemaking?
Your first face-to-face meeting date no matter the context, and then later your first lovemaking date, create the co-Ruling Charts for a relationship before a couple becomes engaged or marries.
Your first date and/or date of your first kiss do not create a Ruling Charts.
I hope this helps to explain.