What is the best time of day for Dating Sites?

So I have been doing some testing lately,

and I was wondering what everyone's best time of day is in terms of free joins.

I am seeing more free joins in the early night, than any other time of day.

6pm-8pm Central Time seems to be the best so far.

Has anyone else experienced anything similar?

Not sure how time of day is relevant from free to paid conversions yet, I just know I can see a definite fluctuation in free joins throughout certain times of the day. I would assume there would be a better free to paid conversion real late at night in terms of almost instant paid joins.

Trying to compile some viable info, would appreciate any help or input from some folks with experience.

I have been getting a bit frustrated with results overall due to lack of consistency with my test campaigns. Some campaigns performed perfectly, some didn't perform at all. Overall I think my free to paid conversion has been around 1:13.

Thanks again for any help I'm a bit confused at the moment.