Question

How to validate particular format date string using Javascript?
I have one date picker which has the display format like “dddd MMMM dd, yyyy”(displaying like this:”Wednesday February 03, 2010”.) So i have to validate this format using javascript. Please help me for implementing this..

Answer 1

If you want to check exactly that format, you could use regular expression:

var re = new RegExp( '^(Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)\\s*(January|February|March|April|May|June|July|August|September|November|December)\\s*(\\d\\d),\\s*(\\d{2,4})$' );

var date = 'Wednesday February 03, 2010';
if ( ( match = date.match( re ) ) != null )
{ // valid
    alert( match );
}

Or if you just need to know if it is a valid date, what format ever, simply convert it:

var dateSec, dateObj, dateStr = 'Wednesday February 03, 2010';
dateSec = Date.parse( dateStr ); // unix timestamp
if ( dateSec ) // not NaN
   dateObj = new Date( dateSec ); // date object