Biorhythms are, in a terribly oversimplified nutshell, a notion that everything and everyone is born with a rythyme - I prefer the term song but anyways.
There isn’t much science to show for it; it could even be compared to reading a horoscope.
Regardless, I have an idea regarding days of the week and friends having commonality with yourself.

My hypothesis is that people with the same day of the week get along best and/or are similar while people with days opposite of each other (like Saturday and Wednesday) are not good matchs or have different interests. I currently have inconclusive data due to lack of sufficent data.

If you could simply reblog with your day of the week you were born with and rating of 1-10 on how well you think my hypothesis applies to you and your relationships with friends or significant other.

I will do some statistical computing every time I reach certain milestones in data pool size to test for correlations.

This purely a personal research project for the sole purpose of my curiousity.
Any and all signal boosts would be very much appreciated.