Jimgriff,
While not actually offended by your greeting I would like to point out that celebration of the winter solstice is in fact a pagan event and it may be offensive to non-pagans to suggest that this is what is actually being celebrated at this time of year. Equally, pagans may themselves feel slighted that you (unless you are a pagan) have hijacked their perfectly respectable astronomical event as part of your culture.
Oh and the schoolmaster in me wants to say your solicitor needs to brush up on the differenece between practice and practise. But as that might prove offensive in this modern world I'll let it pass.
Right I'm off to the pub for an alcoholic beverage and then, eventually, on to Midnight Mass.
Merry Christmas to all