4 ms·To be precise, 2012-12 is valid and refers to a month. There is indeed no ambiguity.by gpvos 14y agoTo be precise, 2012-12 is valid and refers to a month. There is indeed no ambiguity.geon 14y agoSo how would I refer to the 12:th day of the year?sanxiyn 14y ago2012-012. Duh.