Proposed truncated formats for existing formats with digits code
level of detail century implied year implied more implied
d/y YY-DDD 2-3 ? -DDD -3
YYDDD 5 ? DDD 3 ?
m/y YY-MM 2-2 -MM -2
invalid invalid
d/m/y YY-MM-DD 2-2-2 -MM-DD -2-2 --DD --2
YYMMDD 6 invalid invalid
w/y YY-WWW 2-W2 ? -WWW -W2
YYWWW 2W2 ? WWW W2
d/w/y YY-WWW-D 2-W2-1 ? -WWW-D -W2-1 --D --1
YYWWWD 2W3 ? WWWD W3 D 1 ?
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