Will NYC schools celebrate "Christmas" and "Easter"? Or "Winter" and "Spring" holidays? I don't have a problem with Diwali being a holiday, but if the name is used, then use the names "Christmas", "Easter" and "Chanukah", straight-up, no weaselry, no double-standard. Most (all or almost all?) states legally mandate a certain number of in-school days (IIRC, 180 days is typical), so an extra holiday should not decrease the number of in-school days.