toLocaleDateString not supporting non-english locales

[ilapavuluri]

I am using rhino 1.7.14 (latest version) in my java application as JS engine

The below code is returing: 'January 15, 2024' (is the value of create_date_de2)

options = {
weekday: 'long',
year: 'numeric',
month: 'long',
day: 'numeric',
};

create_date_de2 = (new Date()).toLocaleDateString('de-DE',options);

In online javascript, if I run:
const options = { year: 'numeric', month: 'long', day: 'numeric' };
console.log((new Date()).toLocaleDateString('de-DE',options))

it is working fine by providing: 15. Januar 2024

Why rhino is not supporting locale? am I missing anything here? do I need to do any configuration ? Mine is windows machine German language pack also installed.

Appriciate any help on this.

Thanks
Ashok.