years

In most cases, except to indicate a graduating class year, use the full four digits. Do not use an apostrophe to indicate spans of decades or centuries.

• Enrollment for fall 2016 rose sharply.
• She enrolled for the 2021-22 academic year.
• He graduated in the 1990s.
• Her research topic was French literature from 1650 to 1700.
• The banner read, “The Class of ’07 welcomes you to Aggieland.”