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Easter and DST functions have been completely removed now.

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svn: r11929
This commit is contained in:
Rob G. Healey 2009-02-08 23:35:22 +00:00
parent 7ad6cd504e
commit 85992c0ff2
1 changed files with 0 additions and 38 deletions
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38
src/plugins/lib/libholiday.py
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@ -42,50 +42,12 @@ from gen.plug import PluginManager, Plugin
# Support functions
#
#------------------------------------------------------------------------
def easter(year):
"""
Computes the year/month/day of easter. Based on work by
J.-M. Oudin (1940) and is reprinted in the "Explanatory Supplement
to the Astronomical Almanac", ed. P. K. Seidelmann (1992). Note:
Ash Wednesday is 46 days before Easter Sunday.
"""
c = year / 100
n = year - 19 * (year / 19)
k = (c - 17) / 25
i = c - c / 4 - (c - k) / 3 + 19 * n + 15
i = i - 30 * (i / 30)
i = i - (i / 28) * (1 - (i / 28) * (29 / (i + 1))
* ((21 - n) / 11))
j = year + year / 4 + i + 2 - c + c / 4
j = j - 7 * (j / 7)
l = i - j
month = 3 + (l + 40) / 44
day = l + 28 - 31 * (month / 4)
return "%d/%d/%d" % (year, month, day)
def g2iso(dow):
""" Converst GRAMPS day of week to ISO day of week """
# GRAMPS: SUN = 1
# ISO: MON = 1
return (dow + 5) % 7 + 1
def dst(year, area="us"):
"""
Return Daylight Saving Time start/stop in a given area ("us", "eu").
US calculation valid 1976-2099; EU 1996-2099
"""
if area == "us":
if year > 2006:
start = "%d/%d/%d" % (year, 3, 14 - (math.floor(1 + year * 5 / 4) % 7)) # March
stop = "%d/%d/%d" % (year, 11, 7 - (math.floor(1 + year * 5 / 4) % 7)) # November
else:
start = "%d/%d/%d" % (year, 4, (2 + 6 * year - math.floor(year / 4)) % 7 + 1) # April
stop = "%d/%d/%d" % (year, 10, (31 - (math.floor(year * 5 / 4) + 1) % 7)) # October
elif area == "eu":
start = "%d/%d/%d" % (year, 3, (31 - (math.floor(year * 5 / 4) + 4) % 7)) # March
stop = "%d/%d/%d" % (year, 10, (31 - (math.floor(year * 5 / 4) + 1) % 7)) # Oct
return (start, stop)
#------------------------------------------------------------------------
#
# HolidayTable