public PlainDate atDayOfQuarter(int dayOfQuarter) {

        if (dayOfQuarter == 1) {
            return this.start.getTemporal();
        }

        return this.start.getTemporal().with(PlainDate.DAY_OF_QUARTER, dayOfQuarter);

    }
public PlainDate atDayOfQuarter ( int dayOfQuarter ) { if ( dayOfQuarter == 1 ) { return this . start . getTemporal ( ) ; } return this . start . getTemporal ( ) . with ( PlainDate . DAY_OF_QUARTER , dayOfQuarter ) ; }
/*[deutsch]
<p>Kombiniert dieses Quartal mit dem angegebenen Quartalstag zu einem Kalenderdatum. </p>

@param   dayOfQuarter   day of quarter in range 1-90/91/92
@return  calendar date
@throws  IllegalArgumentException if the day-of-quarter is out of range