This is the 4780th most frequent Chinese word.
纪念日
Anniversary or commemorative day.
In this sentence, '纪念日' refers to a specific personal occasion that is commemorated each year, in this case, a wedding anniversary.
今天是我们结婚的纪念日，我们计划一起出去庆祝。
Today is our wedding anniversary; we plan to go out together to celebrate.
Here, '纪念日' denotes a historical occasion remembered annually, emphasizing its national or historical significance.
国家在每年12月7日举行活动，以纪念珍珠港事件的纪念日。
The country holds events every year on December 7th to commemorate the anniversary of the Pearl Harbor incident.
In this example, '纪念日' describes a specially chosen date to remember and honor contributors or founders, showing institutional recognition.