When working with dates in Python, it is common to encounter errors or difficulties when trying to perform operations such as adding or subtracting days. In this article, we will explore three different ways to add 90 days to a given date using Python 3, and determine which option is the most efficient.

Option 1: Using the datetime module

The datetime module in Python provides various classes and functions to work with dates and times. To add 90 days to a given date, we can use the timedelta class from this module.

from datetime import datetime, timedelta

given_date = datetime(2022, 1, 1)
new_date = given_date + timedelta(days=90)

print(new_date)

In this code snippet, we import the datetime and timedelta classes from the datetime module. We then define the given_date as the date to which we want to add 90 days. By using the timedelta function and specifying the number of days as 90, we can add the desired number of days to the given_date. Finally, we print the new_date, which will be the result of adding 90 days to the given_date.

Option 2: Using the dateutil module

The dateutil module is a powerful third-party library that provides various functionalities for working with dates and times. It simplifies date calculations and supports a wide range of date formats.

from datetime import datetime
from dateutil.relativedelta import relativedelta

given_date = datetime(2022, 1, 1)
new_date = given_date + relativedelta(days=90)

print(new_date)

In this code snippet, we import the datetime class from the datetime module and the relativedelta class from the dateutil.relativedelta module. Similar to the previous option, we define the given_date as the date to which we want to add 90 days. By using the relativedelta function and specifying the number of days as 90, we can add the desired number of days to the given_date. Finally, we print the new_date, which will be the result of adding 90 days to the given_date.

Option 3: Using the pandas module

The pandas module is a popular library for data manipulation and analysis. It also provides functionalities for working with dates and times, making it another viable option for adding days to a given date.

import pandas as pd

given_date = pd.to_datetime('2022-01-01')
new_date = given_date + pd.DateOffset(days=90)

print(new_date)

In this code snippet, we import the pandas module as pd. We then use the pd.to_datetime function to convert the given_date into a pandas datetime object. By using the pd.DateOffset function and specifying the number of days as 90, we can add the desired number of days to the given_date. Finally, we print the new_date, which will be the result of adding 90 days to the given_date.

After exploring these three options, it is clear that the most efficient and straightforward solution is Option 1: Using the datetime module. This option requires minimal external dependencies and provides a simple and concise way to add days to a given date. However, the choice ultimately depends on the specific requirements and constraints of your project.