The sighting of the moon differs in Saudi Arabia from the sighting in one’s own country for the festivals and the Day of 'Arafah; should one fast following one’s own country?

Question:
Honorable Shaykh, may Allah grant you success, this questioner is from outside this country. He says: In my country, every year the moon sighting in Saudi Arabia differs from the sighting in my country regarding the festival of sacrifice and standing at 'Arafah. So when do I fast the Day of 'Arafah? Is it following my country or following...

Answer:
...your country? Fast with your country, break your fast with your country, and celebrate the festival with your country. Yes.