WEEKNUMBER


Main5systems
1978/4/15(YY/MM/DD)
WEEKNUMBER OF YEAR
A-TYPE ISO(janyary1)
MONDAY START
1978 week16
[4/10(MON)-4/16(SUN)
★B-TYPE ISO(janyary4)
ISO8601 STANDARD
MONDAY START
1978 week15
[4/10(MON)-4/16(SUN)
★C-TYPE USA(january1)
SUNDAY START
1978 week15
[4/9(SUN)-4/15(SAT)]
D-TYPE USA(january4)
SUNDAY START
1978 week15
[4/9(SUN)-4/15(SAT)]
★E-TYPE SAT(january1)
SATURDAY START
1978 week16
[4/15(SAT)-4/21(FRI)

1978/4(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

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