Orthodox Christmas 2019/2020 in Ukraine and probably some other countries is on 2020-01-07.
God Jul! — Feliĉan Kristnaskon! — ميلاد مجيد — Natale hilare! — Hyvää Joulua! — Срећан Божић! — Prettige Kerstdagen! — クリスマスおめでとう ; メリークリスマス — З Рiздвом Христовим! — Buon Natale! — Joyeux Noël! — С Рождеством! — Frohe Weihnachten! — ¡Feliz Navidad! — Crăciun fericit! — Merry Christmas! — καλά Χριστούγεννα! — God Jul!
This text was generated with a C# program (using Mono on Linux):
using System;
using System.Collections.Generic;
using static System.Collections.Generic.KeyValuePair;
using System.Linq;
class OrthodoxChristmas20192020 {
    private static string[] arr = new string[] {
        "Prettige Kerstdagen!",
        "God Jul!",
        "Crăciun fericit!",
        "クリスマスおめでとう ; メリークリスマス",
        "God Jul!",
        "Feliĉan Kristnaskon!",
        "Hyvää Joulua!",
        "ميلاد مجيد",
        "Срећан Божић!",
        "καλά Χριστούγεννα!",
        "З Рiздвом Христовим!",
        "Natale hilare!",
        "Buon Natale!",
        "Joyeux Noël!",
        "Frohe Weihnachten!",
        "С Рождеством!",
        "Merry Christmas!",
        "¡Feliz Navidad!"
    };
    public static void Main() {
        Random rnd = new Random();
        var shuffled = from item in arr.Select(s => new KeyValuePair<int, string>(rnd.Next(), s)) orderby item.Key select item.Value;
        int count = 0;
        foreach (string s in shuffled) {
            if (count++ > 0) {
                Console.Write(" — ");
            }
            Console.Write(s);
        }
        Console.WriteLine();
    }
}


Happy holidays!
Here’s a slightly shorter version 🙂
„`
public static void Main() {
var rnd = new Random();
var shuffled = arr.OrderBy(x => rnd.Next()).ToArray();
Console.Write(String.Join(“ — „, shuffled));
Console.WriteLine();
}
„`
https://dotnetfiddle.net/EJwrwX
Nice. 🙂
You can already start guessing, which languages I use for New Year and Christmas. Orthodox Christmas in Ukraine (but not in all other predominantly Orthodox countries) has been moved to the 24/25/26th December, so it will be only these two dates this time.