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Unfortunately, it seems that there is no function or argument that can be used yet to the Calculations DateString() function to make it display the full name of the Day of date field. Similar to what was suggested on this thread http://www.jotform.com/answers/386002
Here is the user guide on http://www.jotform.com/help/104-How-to-get-the-Full-Source-Code-of-your-Form
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