Pesach Sheni is the 14th of Iyar, which is a month after Pesach. In the times of the Bet HaMikdash, Pesach Sheni was a day for the people, who couldn't bring the Korban Pesach on Pesach either because they were impure or were too far away from Yerushalayim, to bring a makeup Korban.
Minhagim of the Day
- The minhag is not to say Tachanun on Pesach Sheni. Some question this minhag.
- There is a minhag to eat matzah the day of Pesach Sheni in the afternoon. Some eat it also the night after Pesach Sheni, which is the 15th of Iyar. Some don't have this minhag.
- Bamidbar 9:11-13, Rambam (Korban Pesach 5:1)
- Aruch HaShulchan 131:12, Nitai Gavriel (Pesach v. 3, p. 325)
- Pri Megadim M"Z 131:15. Rav Schachter in a shiur ("Sefirat Haomer", min 50) on yutorah holds that one should say tachanun on Pesach Sheni.
- Nitai Gavriel (Pesach v. 3, p. 330) citing the general minhag.
- Nitai Gavriel (Pesach v. 3, p. 330) citing the Chabad and Satmer minhag.
- Nitai Gavriel (Pesach v. 3, p. 330) citing the Lithuanian minhag.