How to Set Time Zone in Loguru

What will you learn?

In this tutorial, you will master the art of setting the time zone in Loguru, a robust logging library in Python. By customizing the time zone for your logs, you can enhance the accuracy and relevance of timestamped information.

Introduction to the Problem and Solution

Logging is an essential aspect of software development, providing valuable insights into application behavior. Loguru simplifies logging tasks in Python but defaults to UTC timestamps. However, scenarios may arise where logging in a different time zone becomes necessary for precise record-keeping. This tutorial addresses this need by guiding you through seamlessly configuring Loguru to log entries with your desired time zone.


from loguru import logger

# Define log file and format while setting the desired time zone
logger.add("file.log", format="{time:YYYY-MM-DD at HH:mm:ss} | {level} | {message}", serialize=True)

# Update the time zone using logger.patch() (replace 'America/New_York' with your preferred timezone)
logger.patch(lambda record: record["extra"].update(tz="America/New_York"))

# Copyright PHD


To set a specific time zone for logging in Loguru: 1. Utilize logger.add() to specify the log file and format. 2. Employ logger.patch() along with a lambda function to adjust the time zone dynamically.

By following these steps, all subsequent logs generated by Loguru will adhere to the specified time zone seamlessly.

    How can I check my current system’s default timezone?

    You can retrieve your system’s current timezone by using

    Can I change the timestamp format while setting a custom time zone?

    Yes, you have the flexibility to customize timestamp formats within logger.add() when configuring a custom time zone.

    Does changing the timezone impact existing log files?

    No, changing the timezone solely affects future logs; existing log files remain unchanged.

    Is it possible to dynamically change time zones during runtime?

    Yes, dynamic adjustment of time zones is achievable using functions like logger.patch() as required during program execution.

    How do I know which values are acceptable for specifying different time zones?

    Refer to tz database names such as “America/New_York” or “Europe/London” for valid values when defining specific regions’ time zones.


    Enhancing logging operations by managing timestamps with customized time zones offers precision and adaptability using Python’s versatile ‘Loguru’ library. Explore more ways to optimize your Python development journey on

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