The Farhud and 70 Years
Shavuot marks the 70th anniversary of the Farhud.
It may be worth a review of the pages from gog1.com that talk about the 70 years' completion of Bavel and their relation to Mashiah:
Megilla 11b), there may likewise be miscalculations regarding these 70 years. So, while the website started from the establishment of Iraq, there is ample reason to start the count from the Farhud.
(See also this.)