This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.1)

Islamic


represents the Islamic calendar system.
  • This calendar began on Julian, or in the calendar (one date given for the Hejira).
The argument to CalendarChange converts between Western (Gregorian) dates and Islamic dates. This computes the Islamic date of January 1, 2000:
The Islamic calendar has the following months:
The above date is therefore the 24^(th) of Ramadan, 1420.
The Western date for the beginning of Ramadan of the Islamic year 1420:
The Islamic year has fewer days than the Western year:
The Islamic calendar is purely lunar (time of month corresponds to phase of the moon) but does not keep track of seasons, since there is no leap month. The Islamic calendar moves backward with respect to the Western calendar; for example, the start of Ramadan in successive years:
Needs["Calendar`"]
The argument to CalendarChange converts between Western (Gregorian) dates and Islamic dates. This computes the Islamic date of January 1, 2000:
In[2]:=
Click for copyable input
Out[2]=
 
Needs["Calendar`"]
The Islamic calendar has the following months:
In[2]:=
Click for copyable input
The above date is therefore the 24^(th) of Ramadan, 1420.
 
Needs["Calendar`"]
The Western date for the beginning of Ramadan of the Islamic year 1420:
In[2]:=
Click for copyable input
Out[2]=
 
Needs["Calendar`"]
The Islamic year has fewer days than the Western year:
In[2]:=
Click for copyable input
Out[2]=
In[3]:=
Click for copyable input
Out[3]=
 
Needs["Calendar`"]
The Islamic calendar is purely lunar (time of month corresponds to phase of the moon) but does not keep track of seasons, since there is no leap month. The Islamic calendar moves backward with respect to the Western calendar; for example, the start of Ramadan in successive years:
In[2]:=
Click for copyable input
Out[2]=
In[3]:=
Click for copyable input
Out[3]=
In[4]:=
Click for copyable input
Out[4]=
A program which computes the first and last dates of Ramadan for a given Western calendar year for the first Ramadan beginning that year:
Note that Ramadan can overlap January 1, as in 2000:
There is also the possibility that two Ramadans begin in the same Western year, as in 1932. The program returns the first Ramadan beginning that year:
Ramadan of the following Islamic year also began in 1932:
Since the names and the numerical order of the Islamic months are not well known in the Western world, it is useful to have the list of names: