The Ministry of Religious Affair of Indonesia has just announced that Eid-ul-Adha 1440 AH will be on Sunday, 11 August 2019. The announcement was made after several people claimed that they saw the crescent moon (hilal) of the 1 Dhul-Hijjah 1440 AH this evening. The reported positive sightings were received from several places in Java island.
There were no photographic evidence of the claimed hilal sightings, though. Some indonesian experts in astronomy expressed their disbelieve of such naked-eye sighting reports from Java island as the moon is physically very close to the sun and would even cannot be sighted through ordinary telescope.
However, in term social aspect, the announcement has united the muslim in Indonesia to celebrate the Eid-ul-Adha in one day.
Official announcement in indonesian: https://bimasislam.kemenag.go.id/post/berita/pemerintah-tetapkan-idul-adha-1440-h-pada-11-agustus-2019