Validate Date

def getInput(text):
    response = input('Enter {}: '.format(text)).strip()
    return response

def getMonths():
    months = {
        'january':31,
        'february':28,
        'march':31,
        'april':30,
        'may':31,
        'june':30,
        'july':31,
        'august':31,
        'september':30,
        'october':31,
        'november':30,
        'december':31
        }
    return months

def displayInvalid(text):
    print('Invalid {}'.format(text))

def validateYear(year):
    valid = False
    try:
        year = int(year)
        valid = (year>= 1900 and year <= 2050)
        if not valid:
            displayInvalid('Year')
    except:
        displayInvalid('Year')
        valid = False
    return valid

def validateMonth(month,months):
    valid = False
    valid =  month.lower() in months
    if not valid:
        displayInvalid('Month')
    return valid

def validateDay(day,month,months):
    maxDay = months[month]
    valid = (int(day) >= 1 and int(day) <= months[month])
    return valid

okay = False
while not okay:
    year = getInput('Year')
    okay = validateYear(year)

months = getMonths()
okay = False
while not okay:
    month = getInput('Month')
    okay = validateMonth(month,months)

okay = False
while not okay:
    day = getInput('Day')
    okay = validateDay(day,month,months)

print('The date entered is {} {} {}'.format(day,month,year))