מעל הענן נעלה בחדש בעשרים השני בחדש השנית בשנה ויהי” (יב-יא י) “סיני ממדבר למסעיהם ישראל בני ויסעו :העדת משכן
Some have a practice not to say Tachanun from the day of Pesach Sheini for seven days, until 20 Iyar, based on the words of the Zohar (Beha’aloscha 152 2) that during these days the Gates of Heaven are open (see Avodas Ephraim Vol. II, Ch. 24).
Harav Shlomo Kluger brought proof of this practice, which he calls “da’as hamekubalim” from the date when Bnei Yisrael began their journey from Midbar Sinai, as stated in this passuk. Why were Bnei Yisrael delayed in Midbar Sinai until 20 Iyar on the second year after they left Egypt? They arrived at Midbar Sinai on Rosh Chodesh Sivan of the first year, to receive the Torah, but they remained there for almost another year, until after 14 Iyar, because only on Rosh Chodesh Nissan of the second year was the Mishkan inaugurated, and then they had to wait until after the sacrifice of the Korban Pesach, and the korban of Pesach Sheini. So we see that they could have started the trip on 14 Iyar of the second year, after the sacrifice of the Pesach Sheini korban, and yet, they waited another seven days, and traveled only “in the second month on the twentieth day.” This proves that these seven days are considered mo’ed, and thus proof that Tachanun should not be said on those days...
Imrei Shefer
