Lugubrious? Twelve-thirty (p,a).m., lugubrious? What definition of lugubrious you using, Juan? I suppose if you mean "not so silly-sounding", then I guess it is less lugubrious. It also has the advantage of being unambiguous, a trait not shared by those a.m./p.m. versions that plague some people who have trouble when they tag minutes on to 12:00 noon, which, technically is neither a.m. nor p.m. and, I suppose, if you're in a business that has contacts that are liable to show up at half past midnight, then simple context wouldn't be sufficient to let you know what was meant by the oh so lugubrious twelve-thirty.