Friday the 13th and Freya (or Frigga)s Day
Why not being wrong doesn't exactly mean it's right.
So, the idea that Friday the 13th was associated with Freya (or Frigga) and therefore sacred for women is circulating again.
What if we take this apart for a kernel of truth. I'm going to leave the Patriarchy, the Catholic Church and the unlucky part out for a moment and just look at the Freya/Frigga part. (Even amoung the Norse crown, there doesn't seem to be full agreement about which goddess this refers to with some speculating it may have varied regionally. I'll leave it up to the Norse crowd to sort that out. For right now - we just need a goddess starting with F)
First, we're going to start with the Norse calendar. Because to have a Friday the 13th, you need a calendar with a Friday and a 13th. And we may be in luck!
See the Norse followed a lunar calendar with each month starting with the new moon and sacred to the sun. So, if we count that as 1 and follow the current days of the week - every month will have a Friday the 13th. (I haven't been able to completely verify that this was exactly how the Norse counted their days. In fact, they may have worried about counting less than we do because - hey, just look up at the moon.)
But this means - every Friday would have been sacred to Freya/Frigga. Even Friday the 13th. And Friday the 6th. Friday the 20th. Friday the 27th.
You aren't going to deprive a goddess of her due acknowledgement on her day.
So, yes, Friday the 13th would have been sacred to Freya/Frigga
And then the Patriarchy (Darth Vader Music)
Look, the Julian and Gregorian calendars were solar calendars that don't match the Norse lunar calendar so it looks more like we've just got two myths intersecting with a specific, reoccuring day in the Norse calendar.
Except - in Latin it's Veneris (Viernes for Spanish speakers) and in Rome was associated with the planet Venus. (Yes the goddess but the Romans had an odd thing going on with planets).
We've still got our usual set of Fridays. So, why not make all Fridays unlucky?
The usual thought is that 13 was associated Judas and the Last Supper. Which is why we have superstitions around the number 13. And, well, Jesus was crucified on a Friday. So possibly over time, those two came together to make Friday the 13th very unlucky.
But it is unlikely that either Freya or Frigga were involved in the matter. But you may still celebrate your favorite goddess on a Friday.