When you are at an amusement park, but are ready to go home, this is an example of a time when you would call it a day.
Punching the buttons on his car radio, he finally found music that didn't assault his senses and pushed ahead toward Parkside, ready to call it a day.
As I 'm not, I'll throw a couple of shrimps on the barbie and call it a day.
Clearly certain costumes don't require much effort; if you're dressing up as a ghost, you can throw a sheet on and call it a day.
You just drop off the keys and call it a day.