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#!/usr/bin/env python3
# Challenge 175
#
# Task 1: Last Sunday
# Submitted by: Mohammad S Anwar
#
# Write a script to list Last Sunday of every month in the given year.
#
# For example, for year 2022, we should get the following:
#
# 2022-01-30
# 2022-02-27
# 2022-03-27
# 2022-04-24
# 2022-05-29
# 2022-06-26
# 2022-07-31
# 2022-08-28
# 2022-09-25
# 2022-10-30
# 2022-11-27
# 2022-12-25
from datetime import datetime, timedelta
import sys
def last_sunday_month(year, month):
last_day = (datetime(year, month + 1, 1) - timedelta(days=1)) if month < 12 else datetime(year + 1, 1, 1) - timedelta(days=1)
while last_day.weekday() != 6: # 6 is Sunday
last_day -= timedelta(days=1)
return last_day
def last_sunday_year(year):
return [last_sunday_month(year, month) for month in range(1, 13)]
if len(sys.argv) != 2:
raise ValueError("usage: ch-1.py year")
year = int(sys.argv[1])
for date in last_sunday_year(year):
print(date.strftime('%Y-%m-%d'))
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