(1)年；年度；日历年
通常一年有365天，闰年366天。

(2)农业季节
即谷物播种、耕作、收获的过程。

• firmaratio
• firmarium
• firmarius
• firm bid
• firme
• Firmior et potentior est operatio legis quam dispositio hominis.
• firmitas
• firmly
• firm name
• firm name and style
• firm offer
• firmura
• first aid clause
• First Amendment
• first annual election
• first bite
• first blush rule
• first board
• first-class investment
• first-class mail
• first-class misdemeanant
• first-class state of repair
• first-class title
• first conviction
• first cousin