UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36

Steps to reproduce the problem:
1. Execute the following commands in the console:

var formatOptions = { year: 'numeric', month: 'long', day: 'numeric' };
console.log(new Date("2018-01-01T00:00:00").toLocaleDateString("ne-NP", formatOptions))
console.log(new Date("2018-01-01T00:00:00").toLocaleDateString("sq-AL", formatOptions))

What is the expected behavior?
The date should be formatted with a legible month name.
Sensible defaults should be used if locale is not supported yet.

What went wrong?
The month is formatted with "M01", "M02", etc. as the month (e.g., "2018 M01 1")
This is very unreadable. "January" would be a better default value compared to "M01".

Did this work before? N/A 

Chrome version: 70.0.3538.77  Channel: n/a
OS Version: 10.0
Flash Version: