aboutsummaryrefslogtreecommitdiffstats
path: root/lib/python2.7/site-packages/python_dateutil-1.5-py2.7.egg/dateutil/easter.py
diff options
context:
space:
mode:
Diffstat (limited to 'lib/python2.7/site-packages/python_dateutil-1.5-py2.7.egg/dateutil/easter.py')
-rwxr-xr-xlib/python2.7/site-packages/python_dateutil-1.5-py2.7.egg/dateutil/easter.py92
1 files changed, 0 insertions, 92 deletions
diff --git a/lib/python2.7/site-packages/python_dateutil-1.5-py2.7.egg/dateutil/easter.py b/lib/python2.7/site-packages/python_dateutil-1.5-py2.7.egg/dateutil/easter.py
deleted file mode 100755
index d7944104..00000000
--- a/lib/python2.7/site-packages/python_dateutil-1.5-py2.7.egg/dateutil/easter.py
+++ /dev/null
@@ -1,92 +0,0 @@
-"""
-Copyright (c) 2003-2007 Gustavo Niemeyer <gustavo@niemeyer.net>
-
-This module offers extensions to the standard python 2.3+
-datetime module.
-"""
-__author__ = "Gustavo Niemeyer <gustavo@niemeyer.net>"
-__license__ = "PSF License"
-
-import datetime
-
-__all__ = ["easter", "EASTER_JULIAN", "EASTER_ORTHODOX", "EASTER_WESTERN"]
-
-EASTER_JULIAN = 1
-EASTER_ORTHODOX = 2
-EASTER_WESTERN = 3
-
-def easter(year, method=EASTER_WESTERN):
- """
- This method was ported from the work done by GM Arts,
- on top of the algorithm by Claus Tondering, which was
- based in part on the algorithm of Ouding (1940), as
- quoted in "Explanatory Supplement to the Astronomical
- Almanac", P. Kenneth Seidelmann, editor.
-
- This algorithm implements three different easter
- calculation methods:
-
- 1 - Original calculation in Julian calendar, valid in
- dates after 326 AD
- 2 - Original method, with date converted to Gregorian
- calendar, valid in years 1583 to 4099
- 3 - Revised method, in Gregorian calendar, valid in
- years 1583 to 4099 as well
-
- These methods are represented by the constants:
-
- EASTER_JULIAN = 1
- EASTER_ORTHODOX = 2
- EASTER_WESTERN = 3
-
- The default method is method 3.
-
- More about the algorithm may be found at:
-
- http://users.chariot.net.au/~gmarts/eastalg.htm
-
- and
-
- http://www.tondering.dk/claus/calendar.html
-
- """
-
- if not (1 <= method <= 3):
- raise ValueError, "invalid method"
-
- # g - Golden year - 1
- # c - Century
- # h - (23 - Epact) mod 30
- # i - Number of days from March 21 to Paschal Full Moon
- # j - Weekday for PFM (0=Sunday, etc)
- # p - Number of days from March 21 to Sunday on or before PFM
- # (-6 to 28 methods 1 & 3, to 56 for method 2)
- # e - Extra days to add for method 2 (converting Julian
- # date to Gregorian date)
-
- y = year
- g = y % 19
- e = 0
- if method < 3:
- # Old method
- i = (19*g+15)%30
- j = (y+y//4+i)%7
- if method == 2:
- # Extra dates to convert Julian to Gregorian date
- e = 10
- if y > 1600:
- e = e+y//100-16-(y//100-16)//4
- else:
- # New method
- c = y//100
- h = (c-c//4-(8*c+13)//25+19*g+15)%30
- i = h-(h//28)*(1-(h//28)*(29//(h+1))*((21-g)//11))
- j = (y+y//4+i+2-c+c//4)%7
-
- # p can be from -6 to 56 corresponding to dates 22 March to 23 May
- # (later dates apply to method 2, although 23 May never actually occurs)
- p = i-j+e
- d = 1+(p+27+(p+6)//40)%31
- m = 3+(p+26)//30
- return datetime.date(int(y),int(m),int(d))
-