I laugh at holiday letters....
One of my aunts sent one this year and in the first paragraph proclaimed that her new nephew (my baby) was born in January... when he was actually born Dec. 28 which is tomorrow. That was when I stopped reading. It's dumb.
My other aunt has a husband who is Mr. Know-it-all. He used to send out a letter every year (and I am not kidding or exagerating,) that was alwasy 5-10
pages long, depending on the year. I think he stopped doing it either because of the rising cost of postage or the fact that the whole family teased him relentlessly. The letter was sent for about 4 years, and then stopped. Thank heavens! But every December I start to get that tingling.... is the giant Christmas letter on the way???
If I sent a letter it would say: "Dear everyone, we did a lot of great stuff this year that none of you are interested in hearing about, so I won't bore you. Have a great Christmas." LOL

Saves postage to just not do it.