The Daf Yomi is in the middle of the sugya dealing with the date the Torah was given. The Gemara in Shabbos on 87-88 has a dispute between R' Yosi and the Chachamim whether the Torah was given on the 6th or the 7th of Sivan. The dispute hinges on how many days was the perisha before the Torah was given, 2 (Chachamim) or 3 (R' Yosi).<div>
<br></div><div>The obvious question is how can there be a dispute about the date of Matan Torah? Matan Torah was/is THE most important event by far in Jewish history, how can we not know what date it took place? In fact, you would think that every last detail about matan torah would be burned into everyone's memory including everything that happened that week, so how can we not know whether there were 2 days of perisha or 3? The fact is that each one tries to prove his position by darshening the pesukim their way but no one brings a mesora and says I have a kabbala that matan torah was on this date. Why not? </div>