What is the ruling on the difference in sighting the new moon of Ramadan in Islamic countries?

Question:
The questioner says: We are young men who came from an Islamic country to perform 'Umrah. In our country, we had fasted one day before the Kingdom. We will remain in this country until the fifth day of Shawwal. If this country fasts for thirty days, do we fast with them or break our fast? Please note that our country fasted based on astronomical calculations, not on visual sighting.

Answer:
It is obligatory for the Muslim to fast with the Muslims and break his fast with the Muslims. Your ruling is the ruling of the country in which you are. So you fast with this country if the festival or the end of the month arrives while you are there. Your ruling is the ruling of its people; you fast with them and break your fast with them. The Messenger (peace and blessings be upon him) said: "Your fasting is the day you fast, and your breaking of the fast is ." So the Muslim is with the Muslims and does not differ from them.