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dankkom/carnaval_date.py

Created January 8, 2023 20:51
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Calculate Easter and Carnaval dates
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carnaval_date.py
import datetime as dt
def carnaval_date(year: int) -> tuple[dt.date]:
# https://www.vivaolinux.com.br/script/Calcular-a-data-do-Carnaval-e-da-Pascoa
x = 24
y = 5
a = year % 19
b = year % 4
c = year % 7
d = (19 * a + x) % 30
e = (2 * b + 4 * c + 6 * d + y) % 7
if (d + e) > 9:
day = d + e - 9
pascoa = dt.date(year, 4, day)
month = 4
data1 = dt.date(year, month, day)
# O carnaval sera a subtração de 47 dias da data da pascoa
carnaval = dt.date.fromordinal(data1.toordinal() - 47)
else:
day = d + e + 22
pascoa = dt.date(year, 3, day)
month = 3
data1 = dt.date(year, month, day)
carnaval = dt.date.fromordinal(data1.toordinal() - 47)
return carnaval, pascoa
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