International Calendar/Different weeks

Formats for weeks of different length

level of detail	full date		year implied
pentad
d/w/y	±CCYY-PWW-D	±4-P2-1	-PWW-D	-P2-1
	±CCYYPWWD	±4P3	PWWD	P3
w/y	±CCYY-PWW	±4-P2	-PWW	-P2
	±CCYYPWW	±4P2	PWW	P2
hexad
d/w/y	±CCYY-HWW-D	±4-H2-1	-HWW-D	-H2-1
	±CCYYHWWD	±4H3	HWWD	H3
w/y	±CCYY-HWW	±4-H2	-HWW	-H2
	±CCYYHWW	±4H2	HWW	H2
octad
d/w/y	±CCYY-OWW-D	±4-O2-1	-OWW-D	-O2-1
	±CCYYOWWD	±4O3	OWWD	O3
w/y	±CCYY-OWW	±4-O2	-OWW	-O2
	±CCYYOWW	±4O2	OWW	O2
nonad
d/w/y	±CCYY-NWW-D	±4-N2-1	-NWW-D	-N2-1
	±CCYYNWWD	±4N3	NWWD	N3
w/y	±CCYY-NWW	±4-N2	-NWW	-N2
	±CCYYNWW	±4N2	NWW	N2