По введенной дате определить номер для в году, название сезона

months = [31,28,31,30,31,30,31,31,30,31,30,31]
 
try:
    [day,month,year] = [int(i) for i in str(raw_input()).split('.')]
    good =  [
                0 < month <= 12,
                0 < day <= months[month-1],
            ]
    if not all(good):
        raise ValueError
    if month == 12 or month < 3:
        print 'winter'
    elif month < 6:
        print 'spring'
    elif month < 9:
        print 'summer'
    else:
        print 'autum'
    days = day
    for i in range(0,month-1):
        days = days + months[i]
    print 'all days %d' % days
except:
    print 'you have errors in input'

a = int(input('Enter number from 1 to 31'))
b = int(input('Enter number of month from 1 to 12 : '))
if b == 1 or b == 2 or b == 12:
    print ('Winter')
elif b == 3 or b == 4 or b == 5:
    print('Spring')
elif b == 6 or b == 7 or b == 8:
    print('Summer')
elif b == 9 or b == 10 or b == 11:
    print('Autumn')
else :
    print 'Error! In the year 12 month !!!'
if (b == 4 or b == 6 or b == 9 or b == 11) and a> 30:
    print('Error! This month have 30 days')
elif (b == 2) and a > 28:
    print ('Error! February have 28 days ')
elif (b==1 or b==3 or b==5 or b==7 or b==8 or b==10 or b==12) and a>31:
    print ('Error! Month have 31 day')
elif (a<=0):
    print ('Error! Nevernoe chislo')
else:
    m1 = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334]
    C = m1[b-1] + a
    print (C)