Getting year name, for non-Gregorian calendars?

[ajmas]

For a project I am trying to display a given date in a localised calendar, but when using the Chinese calendar I am not getting the year name, so I'd be curious to know how to go about getting it?

The following code is providing 'null' for the year, possibly because the years are named and not numbered:

console.log(DateTime.now().reconfigure({ outputCalendar: calendarType }).toFormat('dd MMMM yyyy'));

Can anyone suggest the correct tokens for this?

This is a screenshot (from an older project) showing how I'm expecting the date to display:

[ajmas]

So it would seem to be the the "G" for the Era, but it doesn't seem to work for the Japanese calendar. Given:

const calendarType = 'japanese';
console.log(DateTime.now().reconfigure({ outputCalendar: calendarType }).toFormat('\'XX\' dd MMMM yyyy G'));
console.log(DateTime.now().reconfigure({ outputCalendar: calendarType }).toLocaleString(DateTime.DATE_FULL));

I get:

XX 12 Twelfth Month null null
12 twelfth month 2024(jia-chen)

[icambron]

On Chrome on my Mac, your first log line gives me:

X 11 January 7 Reiwa

What browser (or other environment) are you using?

This is how Luxon figures out the era name:

new Intl.DateTimeFormat("en-u-ca-japanese", { era: "short" }).formatToParts().find(p => p.type == "era")

Which for me returns

{type: 'era', value: 'Reiwa'}

[ajmas]

I'm testing this using NodeJS on the CLI, on macOS X. I have tried both v22.13.0 and v20.18.1.

Testing this in Chrome on the same machine does provide the Era.

Does NodeJS depend on the OS for this information or does it have its own database of calendars? Just wondering where I should be reporting this, if it is something that should be reported?