I also noticed this with with the following example:

var df = new Intl.DateTimeFormat('en', {year: 'numeric'});
console.log(df.format(Date.now()));

In Chrome or Firefox it outputs: "2014"
While the polyfill outputs: "9/2014"

According to the docs on MDN for Intl.DateTimeFormat:

The default value for each date-time component property is undefined, but if all component properties are undefined, then year, month, and day are assumed to be "numeric".

console.log(new Intl.DateTimeFormat('sv-SE', {
  year: 'numeric', month: 'long', day: '2-digit',
  hour: '2-digit', minute: '2-digit'
}).format(0));

=> 'torsdag 1 januari 1970 0:00:00' // forced weekday and seconds, also incorrect hour format

Is the DateTimeFormat plain broken or am I missing something?

for what I can tell, the locale-data was reduced intentionally to support +90% of the cases in favor of not blowing up the size of the locale-data, which ultimately means that not all combinations are supported, but @andyearnshaw can provide more details.

Not respecting 2-digit hours doesn't seem like an issue of reduction... and while I imagine we're talking about all possible field variations = wowbig is definitely a problem, but omitting weekdays and seconds from a long date can't be that uncommon and odd of a request?

I'll just have to split it in two for now and treat date and time formatting as part of the message.

I just ran into this issue as well and thought I was going crazy.

// Chrome
new Intl.DateTimeFormat('en', { month: 'short' }).format(new Date) // "Feb"
// Polyfill
new Intl.DateTimeFormat('en', { month: 'short' }).format(new Date) // "February 2015"

@andyearnshaw Can you shed any light here?

related to #68, we will try to fix it asap.

@caridy Thank you! ❤️

fixed by #85

@caridy thanks too for this fix! Fantastic work :)

1.0.0-rc-1 is in NPM, help us to test it...

Following issue on Safari will return the short version of the month instead of long, using latest intl@1.0.0. Anyone else having this issue?

Intl.DateTimeFormat('en', {month: 'long'}).format(new Date()); //"Jul"

@mesrob-axs yes, #125 and #126