public function convert_to_timestamp($year, $month, $day, $hour = 0, $minute = 0) {
        $gregorianinfo = $this->convert_to_gregorian($year, $month, $day, $hour, $minute);
        return make_timestamp(
            $gregorianinfo['year'],
            $gregorianinfo['month'],
            $gregorianinfo['day'],
            $gregorianinfo['hour'],
            $gregorianinfo['minute'],
            0);
    }
public function convert_to_timestamp($year, $month, $day, $hour = 0, $minute = 0) {
        $gregorianinfo = $this->convert_to_gregorian($year, $month, $day, $hour, $minute);
        return make_timestamp(
            $gregorianinfo['year'],
            $gregorianinfo['month'],
            $gregorianinfo['day'],
            $gregorianinfo['hour'],
            $gregorianinfo['minute'],
            0);
    }
public function convert_to_timestamp ( $ year , $ month , $ day , $ hour = 0 , $ minute = 0 ) { $ gregorianinfo = $ this -> convert_to_gregorian ( $ year , $ month , $ day , $ hour , $ minute ) ; return make_timestamp ( $ gregorianinfo [ 'year' ] , $ gregorianinfo [ 'month' ] , $ gregorianinfo [ 'day' ] , $ gregorianinfo [ 'hour' ] , $ gregorianinfo [ 'minute' ] , 0 ) ; }
Provided with a day, month, year, hour and minute in the specific
calendar type convert it into the equivalent Unix Time Stamp.

@param int $year
@param int $month
@param int $day
@param int $hour
@param int $minute
@return int timestamp
Provided with a day month year hour and minute in the specific calendar type convert it into the equivalent Unix Time Stamp .