2014 02 04 Date.Date vs Year

Date.getDate() returns the day of the Month, whereas Date.getMonth() returns the previous month (somehow zero-indexed).

    var date = new Date('Tue Apr 01 2014')
    date            // Tue Apr 01 2014 00:00:00 GMT+0200
    date.getDate()  // 1
    date.getMonth() // 3

— @depoulo