This is one of the combined advantages and DISadvantages of a luni-solar religious calendar. The actual day of the New Year varies from year to year in the secular calendar. This is something that is actually familiar territory for a lot of people in our society. It is also something that is not usually explored in the way people think.
I like having “new beginnings” several times a year. It helps keep things fresh in my mind, and it helps me focus on the fact that people of ALL spiritualities will have similar things that happen to them in their spiritual lives.