WEEKNUMBER


Main5systems
1978/5/22(YY/MM/DD)
WEEKNUMBER OF YEAR
A-TYPE ISO(janyary1)
MONDAY START
1978 week22
[5/22(MON)-5/28(SUN)
★B-TYPE ISO(janyary4)
ISO8601 STANDARD
MONDAY START
1978 week21
[5/22(MON)-5/28(SUN)
★C-TYPE USA(january1)
SUNDAY START
1978 week21
[5/21(SUN)-5/27(SAT)]
D-TYPE USA(january4)
SUNDAY START
1978 week21
[5/21(SUN)-5/27(SAT)]
★E-TYPE SAT(january1)
SATURDAY START
1978 week21
[5/20(SAT)-5/26(FRI)

1978/5(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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