These countries have officially declared the day of Eid Al Fitr

Most countries have announced that the first day of Eid Al Fitr is Wednesday, 5th of June, 2019.
The countries that have announced that the said date (5th June 2019) is the day of Eid Al Fitr includes Australia, Japan, Indonesia, Malaysia, Thailand, Pakistan and many others.

According to these countries, the final day of Ramadan is Tuesday, 4th of June, 2019. Which means the next day which is the 5th of June is automatically the day of Eid Al Fitr.