noun
good year; bumper year; lucky year
Refers to a year when something is particularly successful, abundant, or fortunate. Often used for harvests, business results, or personal luck.
今年は米の当たり年で、収穫がとても多かった。
This year was a bumper year for rice, and the harvest was very large.
彼にとっては当たり年で
It was a lucky year for him; he won the lottery.