Метод if, можно ли упростить?

days = range (1, 32)
mounths = range (1, 13)
years = range (1901, 2016)
while True:
    d = int (input ( 'day:'))
    m = int (input ( 'mounth:'))
    y = int (input ( 'year:'))
    if d not in days:
        print("enter days from 1 to 31")
    if m not in mounths:
        print("enter mounths from 1 to 12")
    if y not in years :
        print("enter year from 1901 to 2016")
    break
next_day = d
next_year = y
next_mounths = m
if m == 12 and d == 31:
    next_day = 1
    next_mounths = 1
    next_year = y+1
if m == 12 and d != 31:
    next_day = d+1
    next_mounths = m+1
    next_year = y
if m == 1 or m == 3 or m == 5 or m == 10 or m == 8 or m == 7 and d == 31:
    next_day = 1
    next_mouths = m+1
    next_year = y
if m == 1 or m == 3 or m == 5 or m == 10 or m == 8 or m == 7 and d!= 31:
    next_day = d+1
    next_mounths = m
    next_year = y
if m == 2 and d == 28:
    next_day = 1
    next_mouths = m+1
    next_year = y
if m == 2 and  d != 28:
    next_day = d+1
    next_mounths = m
    next_year = y
if m == 2 and y % 4 == 0 and y % 100 != 0 :
    next_day = d+1
    next_mounths = m
    next_year = y
if m == 2 and d != 29:
    next_day = d+1
    next_mounths = m
    next_year = y
if m == 2 and y % 4 == 0 and y % 100 != 0 and d == 29:
    next_day = 1
    next_mouths = m+1
    next_year = y
if m == 2 and d != 29:
    next_day = d+1
    next_mounths = m
    next_year = y
if m == 11 or m == 9 or m == 6 or m == 4 and d == 30:
    next_day = 1
    next_mounths = m+1
    next_year = y
if m == 11 or m == 9 or m == 6 or m == 4 and d != 30:
    next_day = d+1
    next_mounths = m
    next_year = y
print("The next day date(day, mounths, year):" ,next_day, next_mounths, next_year)

import time
 
days = range (1, 32)
mounths = range (1, 13)
years = range (1901, 2016)
while True:
    d = int (input ( 'day:'))
    m = int (input ( 'mounth:'))
    y = int (input ( 'year:'))
    if d not in days:
        print("enter days from 1 to 31")
    if m not in mounths:
        print("enter mounths from 1 to 12")
    if y not in years :
        print("enter year from 1901 to 2016")
    break
 
t1 = time.strptime(f'{d} {m} {y}', '%d %m %Y') # to struct_time
t2 = time.mktime(t1) # to seconds
t3 = t2 + 60*60*24*2 # plus day
t4 = time.gmtime(t3) # to struct_time
t5 = time.strftime('%d %m %Y', t4) # to new format
 
next_day, next_mounths, next_year = map(int, t5.split())
 
print("The next day date(day, mounths, year):" , next_day, next_mounths, next_year)