# Calculate Months Between Two Dates with Pandas – Simple Tutorial

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If you are dealing with time-based data analysis, then you must have come across the need to calculate the time difference between two dates. This could be anything from calculating the age of a person, the tenure of an employee, or the duration of a project. And if you are using Python for your analysis, then you will love the simplicity and efficiency of Pandas for such calculations.

In this tutorial, we will show you how to calculate the number of months between two dates using Pandas. Unlike some other programming languages where you would need to write custom code for such calculations, with Pandas, it’s just a matter of a few lines of code.

So, if you want to learn how to make use of Pandas’ powerful time-series capabilities to get your desired results, keep reading till the end. We will guide you through the entire process, step-by-step, and also provide you with examples so that you can see the code in action.

Whether you are a beginner or an experienced data analyst, you will find this tutorial useful. By the end of it, you will be able to calculate the number of months between any two dates with ease, and that’s a skill you will definitely need in your data analysis arsenal!

“Pandas – Number Of Months Between Two Dates” ~ bbaz

## Introduction

When it comes to calculating the difference between two dates in python, there are many libraries available. However, if you are dealing with data analysis or manipulation, Pandas is the most preferred library for these tasks. In this tutorial, we will discuss how to calculate months between two dates using Pandas.

## Understanding the “to_period” function

Before proceeding further, let’s understand the datetime functionality of Pandas. The to_period function converts a DatetimeIndex to a PeriodIndex. If we pass the frequency as ‘M’ (Month), it will convert each date into a monthly period.

### The syntax for the “to_period” function:

`` pd.to_datetime(df[column]).dt.to_period('M')``

## Calculating Months between Two Dates

To calculate the number of months between two dates, we need to convert both dates into periods using the ‘to_period’ function. We can then subtract both the periods and convert the result into an integer value using the ‘int()’ function.

### Code Snippet:

`` # Importing Librariesimport pandas as pd # Converting dates into periodsstart_period = pd.to_datetime('2021-01-31').dt.to_period('M')end_period = pd.to_datetime('2022-05-15').dt.to_period('M') # Calculating the difference between the periodsresult = end_period - start_period # Converting the Result into Integerprint(Months between Two Dates:, int(result))``

## Comparison Table

Using Timestamp Simple Code Pandas Timestamp is not ideal for handling large datasets
Using Timedelta Easy to Understand Not efficient for large inputs
Using Period Ideal for Handling Large Datasets A bit complex to Understand

## Conclusion

Calculating months between two dates can be confusing at times. However, with the help of Pandas, it becomes much simpler. In this tutorial, we discussed how to calculate the difference between two dates in months using Pandas. We also compared different approaches to calculate the same and listed their advantages and disadvantages. Hope you find this tutorial helpful!

Thank you for stopping by and reading this simple tutorial on how to calculate months between two dates using Pandas. We hope that this article has been informative and helpful in your data analysis journey.

Pandas is a great tool for data manipulation and analysis, and being able to calculate the months between two dates is just one of the many useful functionalities it offers. With a few lines of code, you can easily extract valuable information from your dataset and gain insights into trends and patterns.

As you continue to use Pandas and explore its capabilities, don’t hesitate to reach out to the community for support and guidance. Whether you’re a beginner or an experienced data analyst, there’s always something new to learn and discover. Happy coding!

• What is Pandas?
• Pandas is an open-source data manipulation library in Python. It provides a fast and efficient way to manipulate and analyze data.

• How do I install Pandas?
• You can install Pandas using the pip package manager. Open your terminal or command prompt and type `pip install pandas`.

• What is the difference between timedelta and relativedelta in Pandas?
• timedelta is used to represent a duration of time, while relativedelta is used to represent a date offset. When calculating months between two dates, we use relativedelta because we want to take into account differences in the number of days in each month.

• How do I calculate the number of months between two dates in Pandas?
1. Convert the dates to datetime objects using the `pd.to_datetime()` function.
2. Calculate the relativedelta between the two dates using the `relativedelta()` function from the dateutil library.
3. Extract the number of months from the relativedelta object using the `.months` attribute.
• Can I calculate the number of months between two dates with different formats?
• Yes, as long as you use the `pd.to_datetime()` function to convert the dates to datetime objects first.

Overall, with the help of Pandas and dateutil libraries, calculating the number of months between two dates in Python can be done easily and efficiently.