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    <p>It is actually possible to modify how a Date object will be serialized into JSON. Combined with the reviver function, a bi-directional solution can be created which will automatically work on serialization and can easily be used on deserialization.</p> <p>First modify the serialization like this:</p> <pre><code>Date.prototype.toJSON = function() { return "{timestamp}+" . this.getTime() } </code></pre> <p>This will change the representation of a Date object into a UNIX timestamp with a prefix as a marker:</p> <pre><code>&gt; json = JSON.stringify({test:new Date()}); "{"test":"{timestamp}1380164268633"}" </code></pre> <p>Then you can create a reviver function which will automatically filter out these values:</p> <pre><code>function json_deserialize_helper(key,value) { if ( typeof value === 'string' ) { var regexp; regexp = /^{timestamp}(\d*)$/.exec(value); if ( regexp ) { return new Date(+regexp[1]); } } return value; } </code></pre> <p>(Credit: This code was basically copied from this answer in a related question: <a href="https://stackoverflow.com/a/14509447/2572897">https://stackoverflow.com/a/14509447/2572897</a>)</p> <p>Now with this setup, deserialization of our result from before will result in a Date object again:</p> <pre><code>&gt; JSON.parse(json, json_deserialize_helper); Object {test: Thu Sep 26 2013 04:57:48 GMT+0200 (CEST)} </code></pre> <p>Or you can choose not to modify the serialization but instead use the regexp to catch the standard serialization format:</p> <pre><code>function json_deserialize_helper(key,value) { if ( typeof value === 'string' ) { var regexp; regexp = /^\d\d\d\d-\d\d-\d\dT\d\d:\d\d:\d\d.\d\d\dZ$/.exec(value); if ( regexp ) { return new Date(value); } } return value; } </code></pre> <p>Example:</p> <pre><code>&gt; json = JSON.stringify({test:new Date()}) "{"test":"2013-09-26T03:05:26.563Z"}" &gt; JSON.parse(json, json_deserialize_helper) Object {test: Thu Sep 26 2013 05:05:26 GMT+0200 (CEST)} </code></pre>
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