I have never tried to increment time realtime
The following lines may work if you place the following in your init.sqs
[]exec "timeplus.sqs"
#start
skiptime 0.5
~60
goto "start"
skips (30 mins i think) every minute
Set the time delay and advancement to whatever meets your requirements
There may be additional things you have to do
It may be that you have to declare a variable and link this to the time parameter
lets say for instance that the time of day is param3
eg param3 = timeplus
timeplus = timeplus + skiptime 0.5
the syntax is wrong but thats the general idea