I believe I have used astronomical references in the Bible to calculate exact dates.

Before getting into dates we need to address Matthew 24:36 about not knowing the hour or the day.

Very briefly, the Greek word "oiden" was slightly mistranslated as "knows" when "has known" would have been more correct. "Oiden" is a past tense verb meaning "has seen" or "has understood."

That and many other passages let us know that despite the common and widespread misperception (Intentional, by the Church, perhaps?) we can eventually know the date, especially likely as we get close to the end.

I believe the Lamb returns October 14, 2019.
The seven year tribulation starts 12/21/2012
and continues until a pole shift starts seven years later, with Judgment Day in December 2019

those who care to learn more check the web site for my book at [link to endtimesand2019.webs.com]