So, if this is accurate they left some time after ~5pm and they didn't take any equipment with them. I'm going to speculate they set out around 8 pm. Even if it was earlier, what could they possibly have been doing at a "holiday outing" that would have let to such actions?
But after the men failed to return to their holiday outing, a family member alerted authorities to their disappearance at around 1 am on Christmas Day.
So these two, with no gear, head into the woods to find bigfoot on Christmas eve and then "failed to return to their holiday outing" and were reported missing after (let's say) six hours.
Some editing may be in order here: ... the pair's lack of preparation for the extreme weather intoxication level and extreme stupidity may have led to their deaths.
Lack of preparation for extremely rugged terrain and winter conditions doesn't mean "no gear."