The Christmas Season for Christians begins on December 25th and ends on January 6th.
Jan 6th is known as "The Feast of the Epiphany" for some Christians; or as "Little Christmas" for others.)
I anticipate and savour the twelve day season by not opening and enjoying my Christmas Cards until December 25th.
I got behind this year, so I did not open my Cards until December 26th (Boxing Day, or St. Stephen's Day.)
Not to worry. December 26th is still in the Christmas Season.
I enjoyed the slow process of opening each and every one; savouring the love and care which each card offers.
(And I use a paper knife which my brother Martyn and his wife Wendy gave me for my 65th birthday. I reserve it for use only in the Christmas Season).