def datesuffix(n):
    """Given day of month return English Ordinal Suffix"""
    if (n == 1 or n == 21 or n == 31):
        suffix = "st"
    elif (n == 2 or n == 22):
        suffix = "nd"
    elif (n == 3 or n == 23):
        suffix = "rd"
    else:
        suffix = "th"
    return suffix