get day of the week from yyyy-mm-dd

I would like to convert a yyyy-mm-dd to something like this:

"Saturday, 2 October 2009"

I would like also to have the option to modify the language both day of the week and month (ma开发者_JS百科ke it customizable)

thanks in advance ;)

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Since you never told us the language, here's a discussion on how to do it in COBOL.

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Assuming .NET (from the datetime tag):

DateTime.Parse("2009-10-02").ToString("D", CultureInfo.CreateSpecificCulture("en"));

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In C, you would use a combination of the localtime() and strftime() functions. They should handle internationalization more or less automatically, if your application is set up for it.

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Convert the date into an integer, representing the days since a specific date, then add a number and apply the modulus operator with the operand 7. That will give you a number 0-6 that represents the day of week.

However, most languages have this functionality built-in.