Muslims performing Hajj will be in ‘Arafah on Tuesday, December 18 (9 Dhul-Hijjah 1428), and (the non-hujjaj) shall be celebrating ‘Eid al-Adhaa on Wednesday, December 19, (10 Dhul-Hijjah 1428), inshaa’Allaah.
Comment by Moonsighting.com: The moon was not even born on Sunday, December 9, Maghrib time in Saudi Arabia, and moon actually set 23 minutes before sun set at Makkah….see sighting reports here.
Another attempt to get muslims to follow saudi for eid ul adha here.