WEEKNUMBER


Main5systems
1977/1/3(YY/MM/DD)
WEEKNUMBER OF YEAR
A-TYPE ISO(janyary1)
MONDAY START
1977 week2
[1/3(MON)-1/9(SUN)
★B-TYPE ISO(janyary4)
ISO8601 STANDARD
MONDAY START
1977 week1
[1/3(MON)-1/9(SUN)
★C-TYPE USA(january1)
SUNDAY START
1977 week2
[1/2(SUN)-1/8(SAT)]
D-TYPE USA(january4)
SUNDAY START
1977 week1
[1/2(SUN)-1/8(SAT)]
★E-TYPE SAT(january1)
SATURDAY START
1977 week1
[1/1(SAT)-1/7(FRI)

1977/1(USA)
SUN MON TUE WED THU FRI SAT
1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31

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