for the rest of us
if jim halpert was the acting manager at rectangle, he'd probably approach holidays in much the same way that he approached birthdays. thus instead of throwing a half-a-dozen, relatively meaningless, rather expensive and wholly unproductive celebrations throughout the year he'd probably establish one previously inconsequential day as festivus and would throw a vending machine catered and tastefully, florescent lit party for one and all.
i don't know if i would do what jim would do, but i think such an action would make sense.
further, if jim was acting manager at rectangle, he either wouldn't participate in stupid gift exchanges with his co-workers or would abolish secret santas, white elephant or other such ignorant schemes altogether. although he is generally a congenial guy, jim wouldn't be roped into buying a gift for his superiors when his minimal yearly commission would make it financially unreasonable to purchase a little something for pam.
i can neither confirm nor deny whether i would support such plans, but i can clearly comprehend jim's logic.
finally, if jim was acting manager at rectangle, he'd undoubtedly be his funny, engaging self, ever eager to pull a prank on andy or catch up with toby over a coffee. however, he would not be desperate enough to make work the social center of his little life and would probably skip out of the festivus party in midstream in order to share a romantic drink with pam on the roof or play a little uninterrupted game of ping pong with darrell.
in regards to the latter, i cannot say i would follow in his steps exactly, but my path would be roughly parallel.
of course, jim isn't the acting manager at rectangle, so the reasonable folk who work there will in no way be rescued from the ignorant, annoying and inefficient schemes of the party planning committee. gee whiz...let the fun begin!