Time is a dimension, but so are puns, I guess.
Why did the clock go to the doctor?
Because it was feeling a little time-wary!
What did the calendar say to the time traveler?
"You're always so time-ly to arrive."
Time to get some timely advice!
Why did the time traveler break up with his girlfriend?
Because he was second-guessing himself!
And so, it seems, time is on our side. But for how long? Only uncertainly so...