I had spoken to "X10 Pro" very early on about this (and pointed out that they had misspelled "Chanukah", as well).
I really liked the idea of being able to program for a Holiday in advance, but I soon realized that this wouldn't work for me.
My X10 setup is still evolving (tweaking timers, and adding devices, etc), so I can't really know more than a few weeks in advance how I would want to set it. In addition, I am trying to conserve energy, and only use the lights and hot-plate when needed. I would need to wait until we finalize our meal schedule (which meals we are eating alone, which ones we have company, and which ones we are eating out), before I could set the schedule.
I usually end up making a copy of my "normal" program, and modifying that to suit the Holiday. Afterward, I simply load the "Normal" one again.
It takes me less than 30 minutes to do the programming for each Holiday, and I know that everything will be scheduled appropriately each time.
I keep the previous files, so I can go back and look at them for reference.