years
Do not include a year with a date if the date will occur or has occurred within a year of the publication date. Exception: the date of death in an obituary, which always includes the year.
For ranges of years, use a hyphen. The first two digits of the year are deleted in the second year of the range only if the range is within the same century: 1974-76; 1967-89; 2000-02; BUT: 1994-2010.
See dates.