Mussaf is added after the Torah Reading of Shacharit (morning prayers) on Shabbat, Yom Tov and Rosh Chodesh.
- Shacharit corresponds to the daily morning sacrifice offered in the Bet Hamikdash.
- Mussaf corresponds to the extra sacrifices offered on Shabbat, Yom Tov and Rosh Chodesh.
- Mincha corresponds to the afternoon daily sacrifice.