Why do young couples put ';k9'; after their anniversary date?

i'm a myspace addict haha and i always see couples put ';k9'; afer their anniversary for example: 10\28\k9


does anyone know what that means?Why do young couples put ';k9'; after their anniversary date?
K is often used as shorthand for 1000, so they might be using it as a shorthand for the year, but in that case it would be more correct to show it as 2k9 for 2009 (similar to ';Y2K';).Why do young couples put ';k9'; after their anniversary date?
I don't know, shouldn't it be like 2k9?
iv never seen that before but you you find out i want to know now lol