If 你 want to wish "Happy New 年 " to someone in Greece, then 你 should say: Kali Hronia.
For "Happy New 年 Day" in Greek 你 should say "Kali Protohronia".
If your friend is called Manolis 或者 Hristos, his nameday is on December 25 (Christmas day). Wish him "Hronia Polla" (Many Happy Returns) for his nameday.
The same applies if your friend is called Vassilis, Yiannis 或者 Fotis. Vassilis nameday is on January 1, Fotis' nameday is on January 6, Yiannis' nameday is on January 7.
During 圣诞节 holiday period, which lasts from December 24 until January 6, plus a couple of weeks past that, it is a custom in Greece to wish "Hronia Polla" to the people 你 meet. So, if 你 meet someone in the morning, the proper way to greet him 或者 her is: Kalimera, Hronia Polla! (Good morning, Many Happy Returns).
O 圣诞节 tree, O 圣诞节 tree!
How are thy leaves so verdant!
O 圣诞节 tree, O 圣诞节 tree,
How are thy leaves so verdant!
Not only in the summertime,
But even in winter is thy prime.
O 圣诞节 tree, O 圣诞节 tree,
How are thy leaves so verdant!
O 圣诞节 tree, O 圣诞节 tree,
Much pleasure doth thou bring me!
O 圣诞节 tree, O 圣诞节 tree,
Much pleasure doth thou bring me!
For every 年 the 圣诞节 tree,
Brings to us all both joy and glee.
O 圣诞节 tree, O 圣诞节 tree,
Much pleasure doth thou bring me!
O 圣诞节 tree, O 圣诞节 tree,
Thy candles shine out brightly!
O 圣诞节 tree, O 圣诞节 tree,
Thy candles shine out brightly!
Each bough doth hold its tiny light,
That makes each toy to sparkle bright.
O 圣诞节 tree, O 圣诞节 tree,
Thy candles shine out brightly!
How are thy leaves so verdant!
O 圣诞节 tree, O 圣诞节 tree,
How are thy leaves so verdant!
Not only in the summertime,
But even in winter is thy prime.
O 圣诞节 tree, O 圣诞节 tree,
How are thy leaves so verdant!
O 圣诞节 tree, O 圣诞节 tree,
Much pleasure doth thou bring me!
O 圣诞节 tree, O 圣诞节 tree,
Much pleasure doth thou bring me!
For every 年 the 圣诞节 tree,
Brings to us all both joy and glee.
O 圣诞节 tree, O 圣诞节 tree,
Much pleasure doth thou bring me!
O 圣诞节 tree, O 圣诞节 tree,
Thy candles shine out brightly!
O 圣诞节 tree, O 圣诞节 tree,
Thy candles shine out brightly!
Each bough doth hold its tiny light,
That makes each toy to sparkle bright.
O 圣诞节 tree, O 圣诞节 tree,
Thy candles shine out brightly!