Shehechiyanu and Kiddush on Yom Tov: A Deeper Look
Shehechiyanu and kiddush on Yom Tov are a beautiful pair. However, we must remember that the second days of Pesach present a unique exception: they are the only nights of yom tov on which Kiddush is recited without Shehechiyanu.
The blessing of Shehechiyanu is recited on mitzvos that occur at specific times of the year. Yom tov itself qualifies, as it returns annually. Even Shemini Atzeres warrants its own Shehechiyanu because it is considered a new yom tov. In contrast, we do not recite Shehechiyanu at kiddush or candle lighting on the final days of Pesach, since those days are viewed as a continuation and conclusion of the yom tov that already began with Shehechiyanu on the first days.
Similarly, on the first day of Sukkos, one recites Shehechiyanu upon taking the lulav for the first time that year. The same applies to mitzvos such as shofar, megillah, and Chanukah lights. These mitzvos are not performed year-round; when we merit to fulfill them, we thank Hashem for sustaining us and enabling us to reach zman hazeh, this moment in time.