The Jewish Calendar has 12 months at 30 days, so 360 days a year.
No, they didn't. The Jewish calendar, based on the Babylonian calendar, did not actually have 360 days per year. That is just a simplification. They had 353, 354 or 355 days in a common year or 383, 384 or 385 days in years with an additional month.
every 19 year cycle (cycle is important in this), there are seven extra
months added, so seven years have a "leap month" for lack of a better
The regular Metonic cycle was only adopted about 100 years after the Neo-Babylonian period. During the Neo-Babylonian period, the additional month was ad hoc based on astronomical observations.
So take 360 days times 19 years gives you 6,840 days,
plus add another 210 days to give you 7,050 days per cycle.
No. Just, no.
Then for fun, I put in October 1, 1975 and subtracted 935,049. WOAH! Sunday, September 9, 586!
I thought that Fred Franz at one point told a group in a special program, "Something happened in 1975, but we're not telling."
Not only is your approach not valid, but Jerusalem was destroyed in 587 BCE, not 586.