Looking at the LOST treaty (very fitting name) and the dividing of Jerusalem quickly on the horizon I’ve started just looking at some calculations as if the 7 year tribulation could start at any time.

As such I’ve used 2014 as the end and potentially the fulfillment of the fall feasts.

Using 2520 days and Thursday October 16th would be the 7th day of Tabernacles
 
From and including: Thursday, November 22, 2007
To, but not including : Thursday, October 16, 2014

It is 2520 days from the start date to the end date, but not including the end date
 

Blessings,

Tony