WEEKNUMBER


Main5systems
1991/12/13(YY/MM/DD)
WEEKNUMBER OF YEAR
A-TYPE ISO(janyary1)
MONDAY START
1991 week50
[12/9(MON)-12/15(SUN)
★B-TYPE ISO(janyary4)
ISO8601 STANDARD
MONDAY START
1991 week50
[12/9(MON)-12/15(SUN)
★C-TYPE USA(january1)
SUNDAY START
1991 week50
[12/8(SUN)-12/14(SAT)]
D-TYPE USA(january4)
SUNDAY START
1991 week50
[12/8(SUN)-12/14(SAT)]
★E-TYPE SAT(january1)
SATURDAY START
1991 week50
[12/7(SAT)-12/13(FRI)

1991/12(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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