More Dateformat options for meridian about date-and-time HOT 3 CLOSED

// Import "medidiem" plugin.
date.plugin('meridiem');

// This is a default A token.
date.format(new Date(), 'hh:mm A');     // => '12:34 p.m.'

// These are extended tokens.
date.format(new Date(), 'hh:mm AA');    // => '12:34 PM'
date.format(new Date(), 'hh:mm a');     // => '12:34 P.M.'
date.format(new Date(), 'hh:mm aa');    // => '12:34 pm'

// The parse() comes to interpret all these meridiem notation with only A token.
date.parse('12:34 p.m.', 'hh:mm A');    // => Jan. 1 1970 12:34:00
date.parse('12:34 PM', 'hh:mm A');      // => Jan. 1 1970 12:34:00
date.parse('12:34 P.M.', 'hh:mm A');    // => Jan. 1 1970 12:34:00
date.parse('12:34 pm', 'hh:mm A');      // => Jan. 1 1970 12:34:00

// The new tokens cannot be used unlike the format().
date.parse('12:34 PM', 'hh:mm AA');     // => Invalid Date