International Calendar/Legacy formats

Existing formats with digits code

level of detail	full date		sample
c	CC	2	2024
y	−CCYY	−4	N/A
	+CCYY	+4	+2024
	CCYY	4	2024
d/y	±CCYY-DDD	±4-3	2024-272
	CCYYDDD	7	2024272
m/y	±CCYY-MM	±4-2	2024-09
	invalid
d/m/y	±CCYY-MM-DD	±4-2-2	2024-09-29
	CCYYMMDD	8	20240929
w/y	±CCYY-WWW	±4-W2	2024-W39
	±CCYYWWW	±4W2	2024W39
d/w/y	±CCYY-WWW-D	±4-W2-1	2024-W39-7
	±CCYYWWWD	±4W3	2024W397