周年
Meanings
whole year; entire year; year-round
Refers to the whole span of a year. In modern Japanese this use is often seen in compound-like expressions such as 周年栽培 or 周年営業; 通年 is more everyday for plain 'throughout the year.'
These tomatoes are cultivated year-round in greenhouses.
They are aiming for year-round operation to stabilize local employment.
nth anniversary; year anniversary
Used after a number or event name to count anniversaries: 10周年, 創立50周年, 結婚30周年. It marks the anniversary year or occasion, not simply the number of years elapsed in any context.
A ceremony was held to celebrate the company's 50th anniversary.
Next month, we will celebrate our 10th wedding anniversary.
Usage patterns
- 〈数〉周年を迎えるto reach the Nth anniversary
The company will reach its 100th founding anniversary next year.
- 〈物〉を周年栽培するto cultivate (a crop) year-round
Tomatoes are cultivated year-round in this greenhouse.
- 結婚〈数〉周年Nth wedding anniversary
My parents celebrated their 30th wedding anniversary this year.
- 〈数〉周年記念Nth anniversary commemoration
The school held a ceremony to commemorate its 50th anniversary.