According to Wiki
... and from Dates and JSON
The new format is "/Date(1404618284153)/" where the number is again the number of milliseconds since January 1st 1970 UTC. I would gladly agree that this is still not super readable, which could be solved by using ISO 8601 instead.
var datestr='/Date(1404618284153)/'; var dateobject=new Date(parseInt(datestr.substr(6)))