I am working on 4.17 LAB Seasons for python Write a program that takes a date as input and outputs the date's season. The input is a string to represent the month and an int to represent the day.

April
11
the output is:

Spring
In addition, check if the string and int are valid (an actual month and day).

Ex: If the input is:

Blue
65
the output is:

Invalid
My code is not shaping up too well. When I do this its either Invalid or Summer:
input_month = input()
input_day = int(input())

if input_month == 'March':
if not(1<=input_day<=31):
print ("Invalid")
elif input_day<=19:
print("Winter")
else:
print ("Spring")
if input_month == 'April' :
if not(1<=input_day<=30):
print("Invalid")
elif input_day <=30:
else:
print("Spring")
if input_month == "May":
I just need to be pointed in the right direction. Thanks for your help!