URL: https://www.nytimes.com/aponline/2019/02/05/us/ap-us-state-of-union-text.html
This year, America will recognize two important anniversaries that show us the majesty of America's mission and the power of American pride.
What does it mean by recognize an anniversary? I looked the word up in dictionary but still can't understand. I don't know which meaning can be used here. Hope someone can give me some help. Thanks in advance!