Add 3 Months Interval to MySQL Date Without Using the Word Months

It is possible with the help of keyword Quarter as follows −

mysql> Select '2017-06-20' + INTERVAL 1 Quarter AS 'After 3 Months Interval';

+-------------------------+
| After 3 Months Interval |
+-------------------------+
| 2017-09-20              |
+-------------------------+
1 row in set (0.00 sec)