All Jewish holidays run sundown to sundown. Tonight is the beginning of the year 5785: Rosh Hashanah, New Year's. Not the party hat-champagne holiday of December 31, Jews reflect on the past year and how they will do better in the coming one. Tikkun olam, repairing the world, is an essential component of that. This year it's been difficult to prepare, but maybe that's always true.