Mega Code Archive
To convert a year-week to a date, then you should also specify the weekday
mysql>
mysql> SELECT STR_TO_DATE('200442 Monday', '%X%V %W');
+-----------------------------------------+
| STR_TO_DATE('200442 Monday', '%X%V %W') |
+-----------------------------------------+
| 2004-10-18 |
+-----------------------------------------+
1 row in set (0.00 sec)
mysql>