Hi Jan,
I know that you have seen this before, but it fits here.
My take is that it all happens in September of this year.
https://unsealedprophecy.wordpress.com/2014/11/24/psalm-83-war-september-2015/
The seventy sevens in Daniel 9:24 refer to years. 483 of the 490 years have already passed. The last seven years will be the tribulation period. The latter 3-1/2 years of the seven are referred to as the “great tribulation” and “the time of Jacob’s trouble”.