I'm calling the holiday Anagantios for now, after the month it takes place in on the Coligney Calendar. It's possible that the Gauls didn't celebrate it at all, but it's sort of ingrained in my brain from other Celtic Reconstructionist paths. I usually offer prayers and songs to Brigindona and do things like inviting the goddess to the "hearth" of my home (I don't really have a hearth) and make preparations looking forward to the first arrival of spring in a few months, usually by cleaning and reorganizing my living space. If I had a hearth I would probably do something surrounding that, but unfortunately I can't have fire in my building.
Sanguina Cruenta
I celebrate Freyfaxi and Lammas at this time of year.
What is Freyfaxi? I haven't heard of that, although I'd guess that it's connected to the harvest in some way... Or am I completely wrong about that?
Esiris
The feeding of the springs happens on the 25th.
Would you mind elaborating a little on this?