The Rebbe~Finding What You Didn't Lose: Pesach Sheni

The "Second Passover" sacrifice was offered as a restitution for the Pascal sacrifice, for someone who was ritually impure or too far away from the Temple at the time of Passover. But Jewish law rules that a non-Jew who converts to Judaism right after Passover, or a child who comes of age right after Passover, must also bring a "Second Passover" sacrifice, even though they were not obligated to bring a sacrifice on the first Passover.

The Talmudic commentaries explain that Second Passover has two facets to it: On the one hand, it is "restitution"; on the other, it is a celebration in its own right. The Rebbe explains...

14 Iyar, 5744~May 16, 1984 (Yiddish with English Sub-Titles)