12:00[am] -- 11:59[am] 12:59[am]是夜里的00:59
12:00[pm] -- 11:59[pm] 12:59[pm]是中午的12:59
00:00 00:59 01:00 11:59 12:00 12:59 13:00 23:59 00:00
12:00am 12:59am 01:00am 11:59am 12:00pm 12:59pm 01:00pm 11:59pm 12:00am