This mysql stored function will return you all the dates between given dates having specified day.
In short if you say: give me all Sundays in this month.

I have following for you:

mysql> select Give_Me_Dates_Days(1,'2012-09-01','2012-10-01') as All_Sundays;
+--------------------------------------------------------+
| All_Sundays |
+--------------------------------------------------------+
| 2012-09-02,2012-09-09,2012-09-16,2012-09-23,2012-09-30 |
+--------------------------------------------------------+

The function parameters are as follows: Give_Me_Dates_Days(DAY_IDENTIFIER,START_DATE,END_DATE)

Sunday = 1 (and rest you can figure-out).
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