I am using moment.js for formatting dates. I want to display date in 'en-JP' culture, but moment.js does not support 'en-JP' language.
Jquery/Javascript code would also be fine.
I want to display date like:
2018年 Aug月 15日 Wednesday
It seems "年", "月", "日" are Japanese for "year", "month", "day" so don't change with the date. So you don't need a library if there's reasonable support for the Intl object via toLocaleString, e.g.
var d = new Date();
var lang = 'en',
year = d.toLocaleString(lang, {year:'numeric'}),
month = d.toLocaleString(lang, {month:'short'}),
day = d.toLocaleString(lang, {day:'numeric'}),
dayName = d.toLocaleString(lang, {weekday:'long'});
console.log(
`${year}年 ${month}月 ${day}日 ${dayName}`
);