Python Program to Display Calendar

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Displaying a calendar within a Python program might sound like a simple task at first, but it can involve more than just printing dates on the console. This article will explore different ways to implement a calendar display in Python, from using built-in libraries to building your own custom calendar.


While modern-day software applications offer integrated calendar solutions, a Python program can also generate and display calendars for various purposes. You can use this feature for appointment management systems, time-tracking software, or personal productivity apps.

Why Display a Calendar in Python?

  • Data Visualization: Displaying a calendar can be essential for visualizing date-related data.
  • Project Management: In project management software, a calendar view is vital for tracking milestones and deadlines.
  • User Experience: For applications that deal with scheduling, an integrated calendar improves the user experience.

Python Built-In calendar Module

Python comes with a built-in module called calendar that offers a wide array of functionalities for handling calendars.

Displaying a Monthly Calendar

To display a calendar for a specific month, you can use the prmonth() method.

import calendar

cal = calendar.TextCalendar()
cal.prmonth(2023, 9)

This will display the calendar for September 2023 in a text-based format.

Displaying a Yearly Calendar

To display a calendar for an entire year, you can use the pryear() method.


Using Third-Party Libraries


Pandas is a powerful data manipulation and analysis library. While not a calendar library, you can use it to create date ranges that can act as a calendar.

import pandas as pd

# Create date range for September 2023
dates = pd.date_range('2023-09-01', '2023-09-30')

Creating a Custom Calendar

For more control over the layout and functionality, you might want to create a custom calendar.

def display_month(year, month):
    import datetime

    # First and last day of the month
    first_day =, month, 1)
    last_day =, month + 1, 1) - datetime.timedelta(days=1)

    # Find the weekday of the first day of the month
    weekday_of_first = first_day.weekday()  # Monday is 0 and Sunday is 6

    print(f"Calendar for {first_day.strftime('%B %Y')}")
    print("Mo Tu We Th Fr Sa Su")

    # Print leading spaces for first row
    print("   " * weekday_of_first, end="")

    # Generate and print dates
    current_day = first_day
    while current_day <= last_day:
        print(f"{}", end=" ")
        weekday_of_first = (weekday_of_first + 1) % 7  # Cycle through 0-6
        if weekday_of_first == 0:
            print()  # New line at the end of the week
        current_day += datetime.timedelta(days=1)

    print()  # New line at the end

# Display September 2023
display_month(2023, 9)

Common Pitfalls and Best Practices

  • Time Zone Handling: Be cautious about time zones when dealing with calendars.
  • Leap Years: Make sure your calendar logic accounts for leap years.
  • User Input Validation: When accepting dates from users, always validate the input to avoid incorrect or misleading calendar displays.


Displaying a calendar in a Python program can serve various purposes and improve the functionality and user experience of your application. Whether you use Python’s built-in calendar module, third-party libraries, or opt to build a custom calendar from scratch, each method has its pros and cons, and your choice will depend on your application’s specific needs. This comprehensive guide should give you a good starting point for implementing calendar features in Python.

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