At first glance these two “Holiday Pass” cards look virtually the same, with the year and specific dates being the only change. In fact, I have several of these (1978, 79 & 80) and they are all basically the same.
The 1981 “Pass is Reusable” and “Good daily from Dec. 2 thru Dec. 18, 1981”
The 1982 pass is “Good for one visit only” and “Good from Dec. 1 thru Dec. 17, 1982". The reason for the change in 1982 was because the “lettered tickets” had been phased out earlier in the year in favor of the all for one Passport. The previous family passes were good for multiple visits because you had to buy attraction tickets to do the good stuff, so why not come back many times and spend more $$$.
By 1982 these Holiday Passes had a whole new value, since getting thru the gate was now the key to the Magic Kingdom and all the rides you can ride! Either way these passes are fun and a neat thing for Disney to do for its employees.
It's the holiday season
So whoop de doo and dickory dock
It's time to go and hang up your sock.