Shavuot, in the third month.

Monday we will read about the giving of the Torah on Mt. Sinai, which is traditionally understood to be on Shavuot. The reading starts “in the third month to the leaving of Egypt”. For Matan Torah to have been in the third month of the Exodus, it would have had to have been a minimum of 59 days later (29 + 29 +1). This would mean that if the first day of Pesach is the day of the Exodus, the earliest day Matan Torah could have been is 9 days AFTER Shavuot, or Pesach is not when the Exodus actually happened. But… we say by Pesach that “This is the night” (Exodus 12:42), so the first option seems more fitting.