string GetPSTDate()
{
    string DateToday = "";
    string DateUTC = llGetDate();
    if (llGetGMTclock() -  llGetWallclock() < 0) //if it's negative then the date has changed.
    {
        integer year = (integer)llGetSubString(DateUTC, 0, 3);
        integer month = (integer)llGetSubString(DateUTC, 5, 6);
        integer day = (integer)llGetSubString(DateUTC, 8, 9);

        if (day == 1) // if day is the 1st of a month, fix the date
        {
            if (month == 1) // if it is January
            {
                year = year - 1; // wind back the year
                month = 12; // set the month to December
                day = 31; // set to last day of December
            }
            else
            {
                month = month - 1; // wind back one month
                if(month == 2)
                    day = 28 + !(year % 4) - !(year % 100) + !(year % 400);
                else
                    day = 31 - (month == 4 || month == 6 || month == 9 || month == 11);
            }
        }
        else
            day = day - 1;
        if(month < 10)
            DateToday = "0";
        DateToday+=(string)month + "-";
        if(day < 10)
            DateToday += "0";
        DateToday+=(string)day;
        return (string)year + "-" + DateToday;
    }
    return DateUTC;
}