Logon_hours is interesting. You will probably need to do some experimenting. Here are some clues about where you will need to start in order to make sense of the bits/time relationship.
note 12AM-1AM id found by using computer time zone
for US EST (GMT-5) (-5*-1)+1
"111110111111111111111111" x 7; position 6 = 12AM-1AM
