The purpose of presenting this calender is primarily for administrative purposes and not adherence. There is no doubt amongst the authoritative ulama that the new month is determined by sighting of the new moon rather than pre-calculation. At present, I do not wish wade into the argument as to when and how sighting should happen. Suffice, it to say the calender presented is subject to change by a margin of one to two days.
1434 AH (1 Muharram) starts on 15 November 2012 and is predicted to end on 3 November 2013 (354 days).
Historic events are many but comparatively only a few need practical consideration in planning. The fasting of the 13, 14 and 15 (Ayyam Bidh) of every month is proven. However, due to its frequency the actual dates in the Gregorian calender will need to be determined month on month pending observation. The 10th of Muharram (Ashurah) is predicted to be on Saturday, 24 November 2012 (variable between Thurs 23th and Mon, 26th November).
Ramadhan is expected to start on Tuesday, 9th of July 2013 (variable between Sun 7th and Thurs 11th July); approximately, 12 days before the summer holidays. Pending 29 or 30 days it is expected to end on Wednesday, 7 August with a two day margin of error.
The earliest Eid al-Fitr may be is on the 5th, 6th, 7th, 8th or 9th August with Wed 7th being the tentative day. As such Eid al-Fitr is expected to be on a weekday. Eid al-Adha is expected on Tuesday 15th October 2013 with also a possibility of it falling on the 13th (Sun), 14th (Mon), 16th (Wed) and 17th (Thu). The nine days before Eid al-Adha including Arafah naturally precede it.
In the northern hemisphere, the shortest day of the year is expected to be on 21 Rajab (21 Dec) whilst the longest day on 12 Sha'ban (21 June). Muharram and Safar until the 7th (20 Dec) is in autumn. 9th Safar to the 7th Jumada I is in winter. 8th Jumada I (20 March) until 11th Sha'ban is in spring. 12th Sha'ban (21 Jun) until the 12 Dhul Qa'dah is in Summer. 13 Dhul Qa'dah (22 Sept) till the end of the Islamic year is in autumn.
Muhammad Saifur Rahman
24 Safar 1434 (after maghrib)
6 January 2013