2019

The First Noel
We see 2 blocks of the Alphabet, however they are both missing the letter 'L' and the star at the first block of the alphabet indicates 'The First No 'L' .
We see a run of numbers from 42 to 1. The cards started in 1977 - some 42 years ago. 20-19 obviously is the year.
( Greetings from Sea[ATL] (Seattle((max) & Atlanta(dan/mary/bridget) ) )
Georgia, Washington are coded as: Alphabet Block Number (dot) Letter Position.
.. and yes, there is a mistake on the card, in the numbers.