On the first day of Adar which falls on a Sabbath, we read the portion of Shekalim. If it falls on a weekday we advance [the read-ing of Shekalim] to [the Sabbath] before and interrupt [the reading of the four parshios] on the next Sabbath. On the second [Sabbath we read the portion of] Zachor [“Remember what Amalek did”]. On the third [Sabbath we read the portion of] Parah Adumah, [“The Red Cow”]. On the fourth [Sabbath we read the portion of] HaChodesh Hazeh Lachem [“This month shall be to you”]. On the fifth [Sabbath] we resume [reading] the regular order.  For all [the following occasions] we interrupt [the regular order]: on Rosh Chodesh, on Chanukah, on Purim on [public] fasts, on maamados and on Yom Kippur.