In which Penelope demonstrates her mastery of the calendar.

↓ Transcript
Panel 1:
(In her office, Penny raves in anger.)
Penny: I can’t stand it any more!

Panel 2:
(Johnny interrupts her rant.)
Penny: This place is driving me mad! And do you wanna know what really gets on my ti-
Johnny (interrupting): Whoa! What’s the matter?

Panel 3:
Penny: I’ll tell you what’s the matter! This week has gone on just one day too long!
Johnny: Um…Penny, today’s Monday.

Panel 4:
Penny: Oh, shut it. You’re mellowing my harsh.