Date

The Date constructor can be used with several types of input:

• You can pass values for year, month, date of the month, hour, minute, second, and millisecond, like so:

          > new Date(2015, 0, 1, 13, 30, 35, 505); 
          Thu Jan 01 2015 13:30:35 GMT-0800 (PST) 
  

• You can skip any of the input parameters, in which case they are assumed to be 0. Note that month values are from 0 (January) to 11 (December), hours are from 0 to 23, minutes and seconds 0 to 59, and milliseconds 0 to 999.
• You can pass a timestamp:

          > new Date(1420147835505); 
          Thu Jan 01 2015 13:30:35 GMT-0800 (PST) 
  

• If you don't pass anything, the current date/time is assumed:

          > new Date(); 
          Fri Jan 11 2013 12:20:45 GMT-0800 (PST) 
  

• If you pass a string, it's parsed in an attempt to extract a possible date value:

          > new Date('May 4, 2015'); 
          Mon May 04 2015 00:00:00 GMT-0700 (PDT) 
  

Omitting new gives you a string version of the current date:

    >...