When you said 2013, that means 2013 anno domini, right?

[Just a guess, but it was the only other calendar time she had a reference for.]

That was the old calendar we used to use. I don't remember how long it went for off the top of my head, but I do remember that it stopped sometime during the mid to late 20th century. That was when the first Space Colonies were established, and the new era began.