It's not really a matter of "opinion".
year·ling
/ˈyɪər
lɪŋ/
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–noun
1.
an animal in its second year.
2.
a horse one year old, dating from January 1 of the year after the year of foaling. –adjective
3.
being a year old.
4.
of a year's duration or standing: a yearling bride.
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