WEEKNUMBER


Main5systems
1990/10/2(YY/MM/DD)
WEEKNUMBER OF YEAR
A-TYPE ISO(janyary1)
MONDAY START
1990 week40
[10/1(MON)-10/7(SUN)
★B-TYPE ISO(janyary4)
ISO8601 STANDARD
MONDAY START
1990 week40
[10/1(MON)-10/7(SUN)
★C-TYPE USA(january1)
SUNDAY START
1990 week40
[9/30(SUN)-10/6(SAT)]
D-TYPE USA(january4)
SUNDAY START
1990 week40
[9/30(SUN)-10/6(SAT)]
★E-TYPE SAT(january1)
SATURDAY START
1990 week40
[9/29(SAT)-10/5(FRI)

1990/10(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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