7th Annual Hamilton Serves Unites College and Community - The 470 members of the Class of 2018 spent part of the day on Aug. 27 volunteering at one of 61 local non-profit agencies.
apostrophes in decades
Use an apostrophe to indicate numerals omitted. Show plural by adding "s": "She attended Hamilton in the '80s." "The 1940s marked a change on college campuses."
SOURCE: Hamilton College Editorial Style Guide