There was a set time cheat in sr2 and I think I remember seeing it in the templates section of the new SRTT cheats. I'll see about adding it to the rare vehicles cheat pack that includes this core mod (if possible.)
Do you quit the phone menu after enabling the cheat? SRTT does not completely change the lighting until you've unpaused the game (although lit windows do bleed in).I tried the TICKTOCK cheat and it DOES work but only seems to cycle time of DAY in DAYLIGHT.
It doesn't work for me and my friend though we put it in the pc folder and the cache folderHere is a mod that enables some of the "hidden" cheats.
Extract this file to your *install location*/packfile/pc folder and replace
pissoffpigs = Hulk Strength
brains = Evil cars
dui = Riots
goldengun = Change time of day
lolz = rath of god