How Can I Efficiently Determine the Last Day of Any Month in Python?

Determining the Last Day of a Month in Python

For developers seeking an efficient and straightforward approach to find the last day of a particular month using Python's standard library, calendar.monthrange comes to the rescue. This function returns an array with two elements: the weekday of the first day of the month and the number of days in that month.

import calendar

# Get last day of January 2002
last_day_of_jan_2002 = calendar.monthrange(2002, 1)[1]  # Result: 31

Handling leap years is also seamless, as demonstrated in the example below:

# Get last day of February 2008 (leap year)
last_day_of_feb_2008 = calendar.monthrange(2008, 2)[1]  # Result: 29

If you prefer a succinct expression, you can use the following code snippet:

calendar.monthrange(year, month)[1]

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