Summary
(5744) The innovation in the boundary of Tashlumin of Shavuot which are "completely mundane" ("Chol Gamur" - Tosfot "Tashlumin" Chag 9a)
Explanation of the concept of Supernal choice of Bnei Yisroel that originated at Matan Torah.
Links
In comparison to the holidays of Passover and Sukkot, Shavuot is a relatively short Jewish holiday. This posed a problem in the times of the Holy Temple because there simply would not be enough time for the holiday sacrificial offerings of the entire nation to be sacrificed; Passover and Sukkot were seven and eight days, respectively, while Shavuot was but a single day. The Talmud explains that there was an extended period of time, referred to as tashlumin (period during which the remaining sacrifices could be completed), that was appended to Shavuot to make up for the relative shortness of the holiday.