Changing year in mysql date

Question

I have a bunch of dates in our database stored in the standard mysql date type.

How can I covert a year to 2013, regardless of original date.

So if a date

Answer 1

If its a date field:

  UPDATE table_name SET date_field_name = CONCAT("2013", RIGHT(date_field_name,6));

If its a date time field:

UPDATE table_name SET date_field_name = CONCAT("2013", RIGHT(date_field_name,15));