Forget about the cake.
How did you know my birthday's Saturday?
The Big Bang Theory Season 1, Episode 16
It's not Saturday night.
The Big Bang Theory Season 5, Episode 21
She had a harp lesson on Saturday
but it got canceled. (STUTTERS)
The Big Bang Theory Season 10, Episode 13
Every Saturday at 8:15.
The Big Bang Theory Season 2, Episode 7
Saturday is laundry night.
The Big Bang Theory Season 2, Episode 7