Assuming you are "in the spirit of the season," what is your reason for being extra pleasant and good toward others during that time of year?

If you never behave this way during the holiday season, then go on your merry way
Well, people don't "need" a reason to be extra nice, but there is a cause, right?

So if you are extra nice during that time of year, what's the cause?
(By the way, I am not religious)