Nobody knows when Ramadhan is going to start until it's started. Same goes for Eid.
It's the QP Diary that contains the approximate dates. Other (non-religious) holidays are known.
Pardon my ignorance, but moon cycles dictate holidays?
Does this mean they aren't known 100% ahead of time?
Unfortunately no way for me to get a QP calendar - does anyone here work for QP? ;oP
Rough dates for the Eid holidays are October 22 to October 26 for Eid al-Fitr so you will probably be able to add the weekend before and the weekend after. Eid al-Adha should coincide with Christmas this year.
The 3rd September is one then around the 23-25th oct depending on the moon!
If your company issue annual diaries, you should find the public holidays in it.
Alternatively, if you can get hold of a QP Desk Diary, they are normally shown in it.