first meeting chart

hey guys

I am new here,
and I have a question!


I met this guys about two years ago,
And I heard about those first meeting charts, and I want to try to calculate it, can anyone guide me through?
what do I need to know, what info in order to calculate it?

Thanks

Hmm. How about the time, date and location at which you first met?

ok I get it, let's say i don't remember the time, i do remember the location, prehaps the date as well
what is next?
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