I am trying to do the same and found a custom function ISLAMIC_TO_SD here: http://www.sascommunity.org/wiki/Sometimes_One_Needs_an_Option_with_Unusual_Dates (Click here to download the SAS code for creating Hebrew and Islamic calendar interval datasets) However, I tested it with today's date (2014-10-23) and the Islamic date is off by one day (1435-12-28 instead of 1435-12-29). I wonder if the author of that function could help...
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