[Misiur]

@master: create now topic

@OP:
Well, let's start with basic method

pawn Код:

public OnGameModeInit() {
    SetTimeout("Payday", XXX, true);
    return 1;
}

forward Payday();
public Payday() {
    static paydays = 0;
    if(1 == paydays % 2) {
        //This is called every 2 paydays
    }
    //Normal payday thingies
    ++paydays;
    return 1;
}

Then you can store current paydays somewhere