'time rule
'0 ---01 1 1900 12:00AM
'1 ---01 1 1900 1:00AM
'2 ---01 1 1900 2:00AM
'3 ---01 1 1900 3:00AM
'4 ---01 1 1900 4:00AM
'5 ---01 1 1900 5:00AM
'6 ---01 1 1900 6:00AM
'7 ---01 1 1900 7:00AM
'8 ---01 1 1900 8:00AM
'9 ---01 1 1900 9:00AM
'10---01 1 1900 10:00AM
'11---01 1 1900 11:00AM
''''''''''''''''''''''''
'12---01 1 1900 12:00PM
'13---01 1 1900 1:00PM
'14---01 1 1900 2:00PM
'15---01 1 1900 3:00PM
'16---01 1 1900 4:00PM
'17---01 1 1900 5:00PM
'18---01 1 1900 6:00PM
'19---01 1 1900 7:00PM
'20---01 1 1900 8:00PM
'21---01 1 1900 9:00PM
'22---01 1 1900 10:00PM
'23---01 1 1900 11:00PM
'[0:0:0,12:0:0) am 12 am,1am----->11am
'[12:0:0,0:0:0) pm 12 pm,1am----->11pm