public static <D extends Comparable> DateExpression<D> addMonths(DateExpression<D> date, int months) {
        return Expressions.dateOperation(date.getType(), Ops.DateTimeOps.ADD_MONTHS, date, ConstantImpl.create(months));
    }
Add the given amount of months to the date

@param date date
@param months months to add
@return converted date
querydsl-sql/src/main/java/com/querydsl/sql/SQLExpressions.java