Years when Ramadan and Rosh Hashana coincide

[Brendan McKay]

I see errors in your list.  For example Rosh Hashana in 1974
was on the 17th, not the 18th.  I checked this with three
independent calendar programs.

Brendan.

* Hans Havermann <pxp at rogers.com> [060924 09:37]:
> Jonathan Post:
> 
> >Right now, in 2006, we have a rare instance of the holiest days of  
> >Judaism and Islam coinciding.  Which other years have this  
> >coincidence?
> 
> Using a quick and dirty Mathematica program, which has built-in  
> calendar conversions, I get the following close approaches for the  
> years 1900-2100:
> 
> Year   Ramadan   Rosh Hashana
> 
> 1908      9/27      9/26
> 1909      9/16      9/16
> 1940      10/3      10/2
> 1941      9/22      9/23
> 1942      9/12      9/12
> 1973      9/28      9/27
> 1974      9/18      9/18
> 1975       9/7       9/6
> 2005      10/4      10/4
> 2006      9/24      9/23
> 2007      9/13      9/13
> 2038      9/30      9/29
> 2039      9/19      9/20
> 2040       9/8       9/8
> 2071      9/25      9/24
> 2072      9/14      9/14
> 
> I assume the reason Mathematica does not see 2006 as coincidental has  
> to do with assumptions about when a day begins. A cursory glance  
> suggests a coincidence or two every 32/33 years.