#library "RT"

global int 52:totaltime;
world int 52:timeaccounted;

function int realtime(void)
{
    return totaltime + timer() - timeaccounted;
}

script 524 UNLOADING
{
    totaltime += timer() - timeaccounted;
    timeaccounted = timer();
}

// Lets pretend we convert 5pm into milliseconds since midnight
startTime = (5 + 12) * 60 * 60 * 1000; // You would set this with a cvar porbably

// Set the current time
currentTime = (startTime + (GetGametic() * 28)) % (24 * 60 * 60 * 1000);

// Now get the hour, minute, and second
int hour = currentTime / (60 * 60 * 1000);
int minute = (currentTime / (60 * 1000)) % 60;
int second = (currentTime / 1000) % 60;

startTime = 61200000
gametic = 12834
currentTime = (61200000 + 359352) % (86400000)
            
hour = 17.09982 (becomes 17)
minute = 5.9892 (becomes 5 or 6 depending on floating point inaccuracy
second = 59.932 (becomes 59)

therefore your time is 5:05:59

./zandronum-server +set clockoffset `date +%s`

zandronum-server +set clockoffset $(((`date +%s`%86400)*35))

function int currenttime(void)
{
    return (relativetime()+getcvar("clockoffset"))%3024000;
}

Quote from Blzut3
It would be trivial to add a function that returns the time since the server started in tics.

Quote from Blzut3
The only reason I can think of for it not being deterministic is that Zandronum server sleeps and thus would need to skip values.

Quote from Blzut3
In other words the point is to return the total time of the game session in tics. The only thing that means for certain is that the first tic of the game returns 0 and the function is strictly increasing as long as the global scope is valid.