fix(time): fixes SECS_PER_YEAR to gregorian constant

[sambacha]

Utilize gregorian average for days

According to the Gregorian Calendar, leap years usually occur every 4th year but are skipped every 100 years unless the year is divisible by 400. 400, 800, 1200, 1600, and 2000 ARE leap years but 100, 200,300, 500 . are not. Thus 2000 is a leap year but 1900 and 2100 are not. A four-century period will be missing 3 of its 100 Julian leap years, leaving 97. So the average year has 365 + 97/400 = 365.2425 days.

Unix Timestamp

1 year (365 days)	31536000 seconds
1 year (avg. 365.24 days)	31556926 seconds
leap year (366 days)	31622400 seconds

Table Reference

****	AverageYear(Days)	ErrorPerYear(Days)	ErrorRatio	CylcePeriod	1-DayShift	100-yearError(Days)
365	365	0.2422	6.63 xx10-4	1,508	4.129	24.22
Julian	365.25	-0.0078	2.14 xx10-5	46,826	128.2	0.78
Gregorian	365.2425	-0.0003	8.2 xx10-7	1,200,000	3,333.30	0.03
4000	365.24225	-0.00005	1.4 xx10-7	7,300,000	20,000	0.005
2//900	365.2422	-0.000022	6.1 xx10-8	16,000,000	45,000	0.002
Jalaali	365.242424	-0.000224	6.1 xx10-7	1,600,000	4,460	0.02
31//128	365.24218750	0 .0000125	3.4 xx10-8	29,000,000	80,000	0.001

source: https://pumas.nasa.gov/files/04_21_97_1.pdf