gergelypolonkai/doomsday

Get doomsday for a given year

Doomsday

The Doomsday Algorithm gives the day of the week for any date (and you can do it in your head).

Usage

$ doomsday --help
Usage: doomsday [OPTIONS] [YEAR]

positional arguments:
  YEAR                  year to find doomsday for

optional arguments:
  -h, --help            show this help message and exit
  -v, --version         show version information and exit
  -c, --copyright       show copying policy and exit
  -r, --reminder        show doomsday algorithm reminder and exit
  -f FORMAT, --format FORMAT
                        date format (default ‘%A’: full weekday name)

Examples

$ doomsday              # current year (2015)
Saturday
$ doomsday -f '%F'      # use a custom format
2015-02-28
$ doomsday 1968         # 1968, a leap year
Thursday

Requirements

Should run on Python 3 and newer iterations of Python 2 without any modifications.

Installation

Just drop it somewhere in your $PATH, e.g., ~/.local/bin/ or /usr/local/bin/ — that's all. However, if your Python interpreter is not installed as /usr/bin/python you will have to change the shebang line to e.g.

#!/usr/bin/env python

Don't worry, be happy 😄