system
A chat on subreddit /r/NoStupidQuestions
human
What does that mean?
gpt
Gatekeeping is someone acting superior because they're more experience at, or better at something than you.

Like if they're saying, "Well anniversaries shouldn't count unless you're married because *we're* married, our anniversaries are more important!"

Though I wouldn't accuse your mom of thinking that intentionally. It's just that people can get defensive of their own accomplishments because they see them as very important. 

Your parents may be subconsciously thinking, "Well dating anniversaries aren't as important because you can just break up at any time. Marriage is a commitment!" Even though you and I both know that dating couples can stay together as long as they want, and older generations have pretty appalling divorce rates.

Just do what you like, keep celebrating your anniversary, and if your parents make a disapproving comment about it just remind them that it's good to celebrate a good thing.