ubiquitin, and others, Sorry. I never meant it to be definitive. But I do remember hearing a lot about this topic, using secular dates (Teshuvas Chasam Sofer maybe). Certainly calling it, defining it as a new year would be worse. Then there’s this issue of what that date signifies. If it’s in reference to Yoshke or”b (of rotted bones), then there’s this aspect of moda/ mokir avodah zara c”v.
I’m by far no halachaknician, not by any stretch of imagination, just saying…