Your expected format ( Wednesday,april 29,2015 ) is not standard , so you will need a custom format :
"dddd,MMMM dd,yyyy"
So, the date 4/29/2015 will output Wednesday,april 29,2015 , which is closer to what you need than the standard D format, which will output Wednesday, April 29, 2015 .
Now that you have the correct format, you need to put it in the report.
There are 2 options:
I assume you have a datetime field called YourDate or a string field called YourDateString .
Sebastien sevrin
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