A:
If someone, after completing the Sawm of Ramadan in their country, breaks the Sawm on the first day of Shawwal on a Shar`y (Islamically legal) basis, they should not observe Sawm if they happen to travel to another country where people are still observing Sawm because Ramadan, according to their sighting, has begun there on a later date. This is because they are to abide by the calendar of the country where they initiated their Sawm provided that ending the Sawm was founded on a Shar`y basis. However, they should not eat openly lest Fitnah (temptation) should take place. And Allah knows best.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.