Christmas Day was remembered by Gaza's Hamas terrorists who fired a rocket towards southern Israel, but protection from above made sure it would drop within Gaza, which it did, harming no one.
It isn't that the terrorists are tired of terrorizing. It's well known that their activities of late have been to look for longer range missiles for the next go-around. They're stockpiling more advanced missiles.
This means that Israel has to be prepared for ways to protect themselves as well. Having the Iron Dome ready is one way.
This latest shot evidently was their way of saying some sort of response to Israel's response to their previous attack of killing an Israeli who was repairing the fence after a storm and was shot by a terrorist sniper. The Israeli was on Israel's side of the fence. They knew what he was doing. He was just an available target.
Resource: Arutz Sheva by Maayana Miskin