When the open date shown on the package or label of a perishable food is more than 90 days from the date of manufacture or packaging, it shall be an open date consisting of the name of or the abbreviation or the numerical designation for the month, and the year or the last two digits of the year, e.g. August 1973; or August 73; or Aug 1973; or Aug 73; or Au 1973; or Au 73; or 08-1973; or 8-1973; or 8-73. When the numerical designation for a month is used, it shall appear before the year or the last two digits of the year, whichever is used.
MS s 31.783
September 23, 2013