    Sentence 1: If one day is not exactly 24 hours and is in  fact 23 hours 56 minutes, shouldn't the error add up,  and shouldn't we see 12 midnight becoming 12 noon at  some point in time?    Sentence 2: Js_12:00-1259 noon before t00  Considered still noon or afternoon? And is 12:00-12:59  midhight before 1:00 still midnight or the morning?