Holidays aren't far, I hope.
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Cipher is a 3x3 rectangle (with open outer borders, think #) with 3 letters in each block, left to right in alphabetical order.
Dot indicates which letter to use; first, second or third.
Answer is as others have figured out: MERRY CHRISTMAS
Edit: Seems i got ninja'ed
With some guesswork and comparing letters it is easy to see that the cipher spells
And the same to you too.