pytz
pytz is a Python library that provides timezone definitions and support for working with timezone-aware datetime objects. It brings the Olson timezone database into Python, allowing developers to handle timezone conversions, daylight saving time adjustments, and localization of dates and times accurately. It is widely used for applications that require precise time handling across different geographical regions.
Developers should learn and use pytz when building applications that involve scheduling, logging, or data processing across multiple time zones, such as in global web services, financial systems, or travel applications. It is essential for ensuring accurate time calculations, especially when dealing with daylight saving time transitions and historical timezone changes, which are not natively supported in Python's standard datetime module.