Mardi Gras break for us is March 3-7 (Mon-Fri), but most people from here will be there sometime between Feb. 28-March 9 (Fri-Sun). We'll be down there then!
I'm in Contra Costa County just outside of SF. Our kids get the full Presidents Week off, no dates in March that I am aware of, and Easter break generally follows Easter.
President's week was restored as a week off next year in our district in CT.
But it is always the first to go if there is a hurricane or early blizzard situation where we lose a lot of days off early in the year.