[Glenn332]

PHP код:

new hour, minutes;
GetPlayerTime(playerid, hour, minutes);
SetPlayerTime(playerid, hour-12, minutes); 


Under OnPlayerDeath or something
or better yet under OnPlayerSpawn

if that one fails to set time when going under 0 use this instead,

PHP код:

new hour, minutes;
GetPlayerTime(playerid, hour, minutes);
for(new OB1=0;12;OB1++) {
                hour -= 1;
        if(hour < 0) {
            hour = 23;// change this to max hour in gta sa environment!
        }
    }
SetPlayerTime(playerid, hour, minutes);