New year holidays finished in Japan
and we went back to work. 
By the way, when do you usually remove your Christmas tree?
Actually, when I cleared away Christmas decoration
in the university where we work on 26 December,
my darling told me that it was bad luck. 
It was a bit shocking comment for me
because in Japan we normally remove Christmas decoration
just after the Christmas day.
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Then we put new year decoration.
However, my darling told me that we should
continue having Christmas decoration until
the 12th days after Christmas. 
It is the 6th January.
So we removed our Christmas tree on that day.
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Do you know why it is after 12th day of Christmas?
I didn't know about it, either.
But one of my friend told me the reason last year. 
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In Europe, Christmas season is relatively long
which is not only 25 December but also 12 days afterwards.
The reason is related to the number of
disciples of Jesus Christ.
He had 12 disciples. 
It is an interesting story, ist't it?
