DaMoshe, define “holiday”.
Sam, the terms mukdam and m’uchar wouldn’t be used for Yomim Tovim since we don’t push them off, except Purim, and we do use the word “makdimim” for krias Megillah.
“Yom Haatzomos” would be offensive to someone who thinks the day has kedushah, but I don’t see how it insults fallen soldiers. It’s not Yom Hazikaron.