Are you concerned about this?
Well first thing DON'T Panic.
I have seen all this before.. Remember that most people actually look at the internet and World Wide Web at their workplace, they take a break at work and low and behold they go onto the web.
Since they are not at work for the next week or so then you can expect some fall off of traffic.
Also bear in mind those people who may be viewing from home at normal periods may be away visiting relatives and friends or may be having friends and relatives visit them.
So in short don't worry. The decline in views is perfectly naromal and your viewing figures will come back in mid January.
It is not some fiendish plot by Google or search engines to steal money from you.
Merry Christmas and a Happy New Year to you all!