First Day of Rosh Hashanah

Tashlich is recited after Mincha, before sunset (6:38pm). [If one is late, he may recite it until the stars emerge (7:10pm).] After Tashlich, there is a custom to shake the edges of one’s Tzitzit. One should not throw food to the fish.

If possible, one avoids eating the meal after the beginning of the tenth Halachic hour (3:32pm), so that one has an appetite for the Rosh Hashanah meal of the second night. One may not perform any preparations on the first day for the second night and day of Chag.