year

A body of students who graduate together.

“she was in my year at Hoehandle High”

A period of time containing 365 (or 366) days.

“she is 4 years old”

“in the year 1920”

A period of time occupying a regular part of a calendar year that is used for some particular activity.

“a school year”

The period of time that it takes for a planet (as, e.g., Earth or Mars) to make a complete revolution around the sun.

“a Martian year takes 687 of our days”