Is it too soon to tell children Santa is watching?

Here in Wales, come Christmas, we all look forward to a visit by the bearded Christmas comrade who brings everyone exactly the same gift. In Yorkshire England, they watch the skies for the coming of Odin. While Tabitha the Christmas hedgehog scuttles around Cumbria bringing Christmas joy but no one wants to sit on her knee.

There's only 123 sleeps to Christmas so is it time to tell children to be good because Santa Claus is watching, or ( Gef the talking mongoose is watching)
Is it too soon to tell children Santa is watching?
Is it too soon to tell children Santa is watching?
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