Begin forwarded message: From: Rochelle Davis Date: December 12, 2010 8:07:53 AM EST To: Dan Walsh Subject: Re: mind bender puzzle thingie This is why: hijri is lunar, gregorian is solar, so they don't match up year for year. there's a 12 day difference (lunar is shorter, that's why ramadan rotates through the gregorian calendar). also, it is 15th century, (qarn), so the year it was produced was 1400 (we are in 1432 now). so the gregorian year it was produced was 1979. if you ever need to do it again, this is what google is for: http://www.islamicfinder.org/Hcal/index.php On Sun, Dec 12, 2010 at 2:56 AM, Dan Walsh wrote: http://www.palestineposterproject.org/poster/al-quds-est-dan-mon-coeur I am trying to navigate to/discover/fix the date this poster was published. It was published by The Palestinian National Commission on the Celebration of the 1500th Anniversary of the Beginning of the Hejira... I suck at math...but wouldn't 622 (the date of the beginning of the Hejira) PLUS 1500 give the date? It doesn't .... it gives 2,122 What am I doing wrong? d -- Rochelle Davis Assistant Professor, Culture and Society Center for Contemporary Arab Studies Georgetown University http://ccas.georgetown.edu