Ramadan 1433 AH:
The Astronomical New Moon is on July 19, 2012 (Thursday) at 4:24 Universal Time (7:24 a.m. Makkah time). Sunset at Makkah on July 19 is at 7:05 p.m., while moonset is at 7:11 p.m. Moon is born before sunset in Makkah and moonset is after sunset. Therefore first day of Ramadan is Friday, July 20, insha’Allah. First Tarawih prayer will be on Thursday night, July 19.
This is of course a calculated date and is subject to change based on the actual sighting of the moon. Alhamdulillah, we learn from the Quran that calculating time is something that Allah has given to us through His creation.
Surah Yunus, Ayat 5: “It is He who made the sun a shining light and the moon a derived light and determined for it phases – that you may know the number of years and account [of time]. Allah has not created this except in truth. He details the signs for a people who know.”