It becomes no longer a specific time, but a couple of several hours ago.
Then it becomes the other day or the past weeks, until it's about a year ago.
After more time, "I remember that year, I was about 5-10 less years old."
Finally comes the day when it's merely a blur and you realize how many other moments that one stole.
So my advice to you before it gets that far is just to simply let it go.