Dear Shari and Toby,
THE 360 DAY YEAR
360 day years in Bible prophecy
A study of calendar history implies an original calendar with a 360 day year and a transition over nearly a 2000 year period to a calendar utilizing 365.24219 days/year to provide a calendar matching the solar year. Sir Robert Anderson's work implies this very strongly.
FROM - Tim Mchyde Know the Future Coming Literal 360 Day Calendar Confirms
There is an interesting confirmation of this from Revelation and Daniel. Those who have studied the Great Tribulation know that its duration is given three different ways: 3˝ years (Dan 7:25; Rev 12:14), 42 months (Rev 11:2; 13:5), and 1260 days (Rev 11:3). In other words, 3.5 years = 42 months = 1260 days, or a calendar on which a year is exactly 12 months and a month is exactly 30 days. Most people reading that do not see how it could literally be true in this world, so they look for some other, non-literal explanation, such as it being some kind of “prophetic calendar.”
In doing so, they are forgetting that our Bible declares we were on a 360/30 calendar once before. The Book of Genesis records that Noah endured the flood for 150 days or exactly 5 months to the day (Gen 7:11, 24; 8:3-4). 150 days divided by 5 months = 30 days a month x 12 months = 360 days. But not only the Bible, many ancient cultures used the same type of 360 day calendar until things changed in around the 8th century BCE. According to Chuck Missler 23 this change was brought on by a close flyby from Mars, which used to have a 720 day orbit bringing it close to Earth twice per year (the “Ides of March” was one of them). If you have ever wondered why we have 360 degrees in a circle and not 365, perhaps now it makes sense to you. When that concept of degrees in a circle was invented, the evidence suggests that there literally were 360 days in Earth's circular orbit to model it after!
Personally, my opinion only, --- Pre diluvium civilization has provided many structures which would be almost impossible to build today. (note: I have 35 years in engineering and construction of the world’s largest industrial facilities.) Their construction and orientation to the stars combined with the technical accuracy indicate a knowledge and awareness of mathematics, solar and lunar cycles similar to ours today. The Bible and other evidence imply very strongly that Pre diluvium years were 360 days long. The alternative Egyptian calendars, Julian calendar and Gregorian calendar are attempts to deal with the post diluvium change to 365+ days.
From the time calculations of Noah and the 7 years in Revelations the days/year basis appears to be 360 during these two periods. The days/year is shifting from 365.24237 to approximately 360 during the first half of the 70th week. Since the wrath of God and the coming of Christ is at the Sept/Oct 72 time frame, the closest we can tie down the start of the 70TH week is Sept/Oct 2030/2065. The number of days is not given for the first half because it will be varying.
THE 360 DAY YEAR.HTM