# A function to determine if a year is a leap year.
# Do not change this function.
def is_leap_year(year):
return (year % 4 == 0) and (year % 100 != 0) or (year % 400 == 0)
# You should complete the definition of this function:
def days_in_month(month, year):
if month in ['September', 'April', 'June', 'November']:
print 30
elif month in ['January', 'March', 'May', 'July', 'August','October','December']:
print 31
elif month == 'February' and is_leap_year(year) == True:
print 29
elif month == 'February' and is_leap_year(year) == False:
print 28
else:
return None