Update index.html

the new Date() functions accept only these specific formats
new Date('December 17, 1995 03:24:00');
new Date('1995-12-17T03:24:00');
new Date(1995, 11, 17);
new Date(1995, 11, 17, 3, 24, 0)
Merge pull request #1 from Alecaddd/patch-1

Update index.html