1 yr === 365.242216 days = 365 d 5 h 48 m 46 s
not === 365.250000 days = 365 d 6 h 00 m 00 s
so each year == 11 m 14 s or 674 too many seconds are added to the calendar. At this rate -- in 128 years, an extra day is added that shouldn't be.
@ the rate of 674 sec / yr then how long would it take to add one day ?
One day = 86,400 sec
so in 128.1899 yrs = a day was missing ( 86,400 / 674 )
so 32 leap years (which is 128 years) later, they added a day that had already been 'silently added' thru the years -- and didn't need to be.
so like always, they celebrated the 1st day of spring on March 21st, 453, but it actually occurred, "yesterday" ( see below )
the first day of spring would be occurring a day earlier every 128 years. See - -
First day of spring is okay in 325 A.D. --- but ---
mar 21 = 325 A.D. + 128 years =
mar 20 = 453 A.D. + 128 years =
mar 19 = 581 + 128 years =
mar 18 = 709 + 128 years =
mar 17 = 837 + 128 years =
mar 16 = 965 + 128 years =
mar 15 = 1093 + 128 years =
mar 14 = 1221 + 128 years =
mar 13 = 1349 + 128 years =
mar 12 = 1477 + 128 years =
Wed, Oct 4th was followed by Thurs, Oct 15th because
10 DAYS THAT HAD BEEN ALREADY "ADDED," were axed . . .
"a time to reap . . . a time to sow . . . for everything . . . there is a season . . . turn, turn, turn . . ."
-- so 1700 / 1800 / 1900 were not Leap Years.
2000 will be. That is -- century years not divisible by 400 are not leap years.
10 / 6f / 95
p.s.
check this out:
45 bc -- the year of confusion = had 445 days