Generate all ordinal days for a given year.

ordinal.py

"""
Generate ordinal days for a given year.

January 1st, January 2nd, January 3rd ... December 31st.
"""

import calendar
import datetime

def suffix(day):
    return ({11: 'th', 12: 'th', 13: 'th'}.get(day) or
            {1: 'st', 2: 'nd', 3: 'rd'}.get(day % 10, 'th'))

def ord_month(year, month):
    cal = calendar.Calendar()
    return (str(d) + suffix(d) for d in cal.itermonthdays(year, month) if d)

def ord_year(year):
    months = calendar.month_name[1:]
    return (f'{m} {d}' for i, m in enumerate(months) for d in ord_month(year, i+1))

def main():
    year = datetime.date.today().year
    print('\n'.join(ord_year(year)))

if __name__ == '__main__':
    main()