time of year
— Noun
– English
～ one of the natural periods into which the year is divided by the equinoxes and solstices or atmospheric conditions; "the regular sequence of the seasons"
three year old
— Noun
– English
～ a racehorse that is three years old
tropical year
— Noun
– English
～ the time for the earth to make one revolution around the sun, measured between two vernal equinoxes
two-year-old
— Adjective
– English
～ two years of age
two-year
— Adjective
– English
～ having a life cycle lasting two seasons; "a biennial life cycle"; "parsnips and carrots are biennial plants often grown as annuals"
third-year
— Adjective
– English
～ used of the third or next to final year in United States high school or college; "the junior class"; "a third-year student"
three-year-old
— Adjective
– English
～ three years of age