I have hair that falls below my shoulders. I want to cut it into a bob, trim all the split ends, and…

I have hair that falls below my shoulders. I want to cut it into a bob, trim all the split ends, and return to my natural hair color. The stylist has an opening tomorrow. But according to the calendar, it's a neutral day, meaning hair won't grow faster than usual. The favorable days are after September 20, but I need a cut right now... Do you believe in such a calendar?