It is simply a default setting.
3 oclock
12 oclock 6 oclock
Speed laws are always in effect no matter what time of day it is.
nine oclock and six oclock
2.00 oclock
12 oclock
9 oclock
at 9 oclock
It would be 8 Oclock Minus one hour.
at 11 oclock
6 oclock 7 ocklock or 8 oclock i am very not sure
10 oclock monday thru Friday 8 oclock on Saturday appointments only on Sunday