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1. Point Location on Axes2. Check Pythagorean Triplet3. Check Valid Calendar Date4. Clock Angle Calculation5. Check Arithmetic Progression6. Check Geometric Progression7. Digit Sum vs Product8. Compare Two Dates9. Determine Century10. Absolute Difference Check

Check Valid Calendar Date

Take day and month and check if it forms a valid calendar date (ignoring leap years).

AdvancedPhase 1 - Level 5: Creative / Tricky Logical ScenariosExample 3 of 10
check-valid-calendar-date.py
1# Take day and month
2day = int(input("Enter day: "))
3month = int(input("Enter month (1-12): "))
4

5# Check validity
6if month < 1 or month > 12:
7    print("Invalid month")
8elif month in [1, 3, 5, 7, 8, 10, 12]:
9    if 1 <= day <= 31:
10        print("Valid date")
11    else:
12        print("Invalid date")
13elif month in [4, 6, 9, 11]:
14    if 1 <= day <= 30:
15        print("Valid date")
16    else:
17        print("Invalid date")
18elif month == 2:
19    if 1 <= day <= 28:
20        print("Valid date")
21    else:
22        print("Invalid date")

Output

Enter day: 31
Enter month (1-12): 1
Valid date

Enter day: 31
Enter month (1-12): 4
Invalid date

Enter day: 29
Enter month (1-12): 2
Invalid date

What's going on

Check day validity based on month.

Key Concepts:

31 days: Jan, Mar, May, Jul, Aug, Oct, Dec
30 days: Apr, Jun, Sep, Nov
28 days: Feb (ignoring leap year)
Validate day range for each month type

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PreviousCheck Pythagorean TripletNextClock Angle Calculation