In order to get last day of current year, you can use LAST_DAY() from MySQL. The syntax is as follows−
SELECT LAST_DAY(DATE_ADD(CURDATE(), INTERVAL 12-MONTH(CURDATE()) MONTH));
Let us implement the above syntax to know the last day of current year−
mysql> SELECT LAST_DAY(DATE_ADD(CURDATE(), INTERVAL 12-MONTH(CURDATE()) MONTH));
This will produce the following output −
+-------------------------------------------------------------------+ | LAST_DAY(DATE_ADD(CURDATE(), INTERVAL 12-MONTH(CURDATE()) MONTH)) | +-------------------------------------------------------------------+ | 2019-12-31 | +-------------------------------------------------------------------+ 1 row in set (0.00 sec)