Python Module: Datetime
Posted: Jul 14, 2025
Updated: Jul 28, 2025
A summary/cheatsheet for Python built-in datetime module.
This summary covers the core classes and common use cases for working with dates, times, time differences, and formatting in Python.
Common strftime() Format
strftime() stands for “string format time”, and it’s used to convert a datetime object into a readable string.
| Code | Meaning | Example Output |
|---|---|---|
%Y | Year (4 digits) | 1999 |
%m | Month (01–12) | 04 (April) |
%d | Day of month (01–31) | 19 |
%A | Full weekday name | Monday |
%a | Abbreviated weekday | Mon |
%B | Full month name | April |
%b | Abbreviated month name | Apr |
%H | Hour (00–23) | 07 |
%I | Hour (01–12) | 07 (with AM/PM) |
%p | AM or PM | AM |
%M | Minute (00–59) | 00 |
%S | Second (00–59) | 00 |