so when simon was playing with the tv, he song the theme song from the show Cheers.
this show ran from 1982 to 1993
Marcy had no idea what it was so I am assuming she wasnt born until after 1993.
so lets just say she was born in 1995. Simon says she is 7. so this would take place in about 2002.
Now, since she is 1000 years old. the year is APPROX 2995
Simon says he is 47, which if the year was 1995, would make his year of birth about 1948.
just a theory. :)