These days stores are concerned about a Green Christmas and that people aren't in the Christmas spirit to go out and buy. In times past that's not something our Ottawa ancestors worried about.
Google Ngram shows an increase in use of the term "Green Christmas" starting in about 1940, dwarfed by use of "White Christmas" -- Bing Crosby first crooned the song at that time.
Use increased from the 1940s onward. On 24 December 1942 there was mention of it being the greenest Christmas in Ottawa's recent history. In 1949 the paper reported "it's going to be a Green Christmas" on the 24th, the previous year on the 23rd "it sure looks like a Green Christmas for Ottawa", a previous item that year had looked back to the Green Christmas of 1923. The term was not found in that year although the warmth was remarked on. The Journal reported that 1964 was the first green Christmas in 20 years.