What exactly is the difference betweekn 記念日 and 周年? I found both to mean "anniversary". Thank you in advance.

1 Answer 1


周年 just indicates the number of years that something has been in continuing or in operation. This term is used in regards to anniversaries, but only as a description of what the anniversary is for.

記念 is remembrance or commemoration. Adding 日 to it makes it 'Commemoration Day', or 'Anniversary'.

These two terms are often used together to indicate both the celebration/commemoration and what specifically it is celebrating.

10周年(の)結婚記念日. Day of celebration of 10 years of marriage; 10-year (marriage) anniversary.

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