If you are using OLE Automation dates in .NET check out Markit On Demand's moment-msdate. Using this plugin allows you to format OA dates into JavaScript dates and vice-versa.

Convert a moment to an OA date:

moment().toOADate(); // a floating point number

Or, convert an OA date to a moment:

moment.fromOADate(41493); // Wed Aug 07 2013 00:00:00 GMT-0600 (MDT)

More information and detailed docs can be found on GitHub at http://markitondemand.github.io/moment-msdate/.