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holydate_func.py
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holydate_func.py
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"""
All functions for orthodoxy calendar
"""
def easter(year):
"""
Calculate orthodoxy easter
"""
def mod(x, y):
return x % y
a = mod(year, 19)
b = mod(year, 4)
c = mod(year, 7)
d = mod((19 * a + 15), 30)
e = mod((2 * b + 4 * c + 6 * d + 6), 7)
if d + e <= 9:
month = 3
day = 22 + d + e
else:
month = 4
day = d + e - 9
if month == 4 and day == 26:
day = 19
if e == 6 and day == 28:
day = 18
return day, month, year
def ju_to_jd(day, month, year):
"""
Convert julian calendar date to Julian Date(JD).
"""
def mod(x, y):
return x / y
a = mod(14 - month, 12)
b = year + 4800 - a
c = month + 12 * a - 3
#calculate julian date
jd = day + mod(153 * c + 2, 5) + 365 * b + mod(b, 4) - 32083
return jd
def gr_to_ju(day, month, year):
"""
Convert Griorian calendar date to Julian Date(JD).
"""
def mod(x, y):
return x / y
a = mod(14 - month, 12)
b = year + 4800 - a
c = month + 12 * a - 3
#calculate julian date
jd = day + mod(153 * c + 2, 5) + 365 * b + mod(b, 4) - \
mod(b, 100) + mod(b, 400) - 32045
return jd
def jd_to_ju(jd):
"""
Convert Julian Date(jd) to julian calendar date.
"""
def mod(x, y):
return x / y
e = 0
g = jd + 32082
f = mod(4 * g + 3, 1461)
j = g - mod(1461 * f, 4)
i = mod(5 * j + 2, 153)
day = j - mod(153 * i + 2, 5) + 1
month = i + 3 - 12 * mod(i, 10)
year = 100 * e + f - 4800 + mod(i, 10)
#return julian calendar date:
return day, month, year
def jd_to_gr(JD):
"""
Convert Julian Date(JD) to Grigorian calendar date.
"""
def mod(x, y):
return x / y
d = JD + 32044
e = mod(4 * d + 3, 146097)
g = d - mod(146097 * e, 4)
f = mod(4 * g + 3, 1461)
j = g - mod(1461 * f, 4)
i = mod(5 * j + 2, 153)
day = j - mod(153 * i + 2, 5) + 1
month = i + 3 - 12 * mod(i, 10)
year = 100 * e + f - 4800 + mod(i, 10)
#return Grigorian calendar date:
return day, month, year
def weekday_ju(day, month, year):
"""
Return weekday in Julian calendar(0-6 ~ Sun-Sut)
for year, month (1-12), day (1-31).
"""
def mod(x, y):
return x / y
a = mod(14 - month, 12)
y = year - a
m = month + (12 * a - 2)
weekday = (5 + day + y + mod(y, 4) + mod(31 * m, 12)) % 7
#return weekday:
return weekday
def gr_to_jd(day, month, year):
"""
Convert Griorian calendar date to Julian
calendar date.
"""
def mod(x, y):
return x / y
a = mod(14 - month, 12)
b = year + 4800 - a
c = month + 12 * a - 3
#calculate JD
jd = day + mod(153 * c + 2, 5) + 365 * b + mod(b, 4) - \
mod(b, 100) + mod(b, 400) - 32045
#Calculate julian calendar date from JD.
e = 0
g = jd + 32082
f = mod(4 * g + 3, 1461)
j = g - mod(1461 * f, 4)
i = mod(5 * j + 2, 153)
day = j - mod(153 * i + 2, 5) + 1
month = i + 3 - 12 * mod(i, 10)
year = 100 * e + f - 4800 + mod(i, 10)
#return julian calendar date:
return day, month, year