The Javascript method getTime() returns the number of milliseconds since midnight January 1, 1970.
getTime()
How do I convert the output getTime() to a Ruby Time object?
You can use the Time.at method and divide the JavaScript timestamp value by 1000, since the at method uses seconds instead of milliseconds, for example:
jsTime = 1252268867928 print Time.at(jsTime/1000) # Sun Sep 06 20:27:47 +0000 2009