Difference 記念日 vs 周年


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




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.




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.

