dates.js

new Date('12 dec, 20111')     //-> +020111-12-11T23:00:00.000Z
new Date(-1, 1)               //-> -000001-01-31T23:00:00.000Z
new Date(-1, -1)              //-> -000002-11-30T23:00:00.000Z
new Date(-10, 1)              //-> -000010-01-31T23:00:00.000Z
new Date('12 dec, 000201')    //-> 0201-12-11T23:00:00.000Z
new Date('12 dec, 201')       //-> 0201-12-11T23:00:00.000Z
new Date('1212 dec')          //-> 1212-11-30T23:00:00.000Z
new Date('1212 2 dec 2')      //-> 1212-12-01T23:00:00.000Z
new Date('1212 2 dec 4')      //-> 1212-12-01T23:00:00.000Z
new Date('1212 2 dec')        //-> 1212-12-01T23:00:00.000Z
new Date('1212 dec 2')        //-> 1212-12-01T23:00:00.000Z
new Date('1212 2 dec 4:00')   //-> 1212-12-02T03:00:00.000Z
new Date(null, null)          //-> 1899-12-31T23:00:00.000Z
new Date(0, 1)                //-> 1900-01-31T23:00:00.000Z
new Date(null, 1)             //-> 1900-01-31T23:00:00.000Z
new Date(1, 1)                //-> 1901-01-31T23:00:00.000Z
new Date(1, 1, 1)             //-> 1901-01-31T23:00:00.000Z
new Date(10, 1)               //-> 1910-01-31T23:00:00.000Z
new Date(0)                   //-> 1970-01-01T00:00:00.000Z
new Date(false)               //-> 1970-01-01T00:00:00.000Z
new Date(null)                //-> 1970-01-01T00:00:00.000Z
new Date(1)                   //-> 1970-01-01T00:00:00.001Z
new Date(true)                //-> 1970-01-01T00:00:00.001Z
new Date(2017)                //-> 1970-01-01T00:00:02.017Z
new Date(80, 1)               //-> 1980-01-31T23:00:00.000Z
new Date('1')                 //-> 2000-12-31T23:00:00.000Z
new Date('1, 1, 1')           //-> 2000-12-31T23:00:00.000Z
new Date('12 dec')            //-> 2001-12-11T23:00:00.000Z
new Date('12 december')       //-> 2001-12-11T23:00:00.000Z
new Date('2 dec 4')           //-> 2004-12-01T23:00:00.000Z
new Date('2017')              //-> 2017-01-01T00:00:00.000Z
new Date(2017, 1)             //-> 2017-01-31T23:00:00.000Z
new Date(2017, 1, 1)          //-> 2017-01-31T23:00:00.000Z
new Date(2017, 1, 3)          //-> 2017-02-02T23:00:00.000Z
new Date('2017-11')           //-> 2017-11-01T00:00:00.000Z
new Date('2017/11')           //-> 2017-10-31T23:00:00.000Z
new Date('2017/11/1')         //-> 2017-10-31T23:00:00.000Z
new Date('2017/11/3')         //-> 2017-11-02T23:00:00.000Z
new Date()                    //-> 2017-11-21T14:33:54.397Z
new Date('1212 foo')          //-> Invalid Date
new Date('2017000001')        //-> Invalid Date
new Date('true')              //-> Invalid Date
new Date(-1, undefined)       //-> Invalid Date
new Date(1, undefined)        //-> Invalid Date
new Date(NaN)                 //-> Invalid Date
new Date(NaN, 1)              //-> Invalid Date
new Date(undefined)           //-> Invalid Date

funnyfuzzy.js

typeof NaN == 'number';
42 == [[[[[[[42]]]]]]];
'foo' > 'bar';
NaN != NaN;

5 - '3' === 2
5 + '3' === '53'
'5' - '3' === 2
'5' + + '5' === '55'
'foo' + + 'bar' === 'fooNaN'
'5' + - '2' === '5-2'
'5' + - + - - + - - + + - + - + - + - - - '-2' === '52'

[] + [] === ''
[] + {} === '[object Object]'
{} + [] === 0
{} + {} === NaN