Being a Muslim, I don't celebrate the festival because it goes against our religious beliefs, but those who are celebrating it, I wish them a good one and I hope they enjoy the festival and their holidays with friends and families. 
Pakistan is generally a Muslim country. However, we do have people from all religions living here. So, you can wish them. Let me provide you with the translations that you can add.
Merry Christmas = کرسمس مبارک ہو
Happy Holidays = چھٹیاں مبارک ہو
If you can provide a translation for “Happy Holidays!” For both languages, I will add them to the list!
Pakistan is generally a Muslim country. However, we do have people from all religions living here. So, you can wish them. Let me provide you with the translations that you can add.
Merry Christmas = کرسمس مبارک ہو
Happy Holidays = چھٹیاں مبارک ہو