Monday's Riddle! Take a Break!

Hello Riddlers! Here's the puzzle this week. Can you guess the theme? It won't be a mystery much longer ; ) ~ F

I am a different type of a break. I am not in a sentence, but something you take. When the moment is right and things in their place, seek out a spot and empty your space. Let it go- enjoy the day! Sit back and be merry, so they say. When the road traveled has been thoroughly tread, fond memories of me will swell in your head. But, fear not when I leave, for I lurk round' the bend, keeping in my pocket another fine day to lend. 

What am I?

I gave you a clue!

I would like a trip in this bus, wherever it is going : )
FEAR NOT THE UNEXPECTED