How to Set Your OS System Clock

This article explains how to set your computer's system clock so you can use it to check the time and ensure an incorrect time, date, and time zone doesn't cause errors in various system components.

How to Set the System Clock on Your Computer

The instructions for changing the time, date, or time zone on your computer are different depending on your operating system.

Windows

1. Open Control Panel.

2. Choose Clock and Region or Clock, Language, and Region from the list of Control Panel applets.

   If you don't see that applet, it means you're not viewing the items in Category view. Skip down to Step 3.

3. Select Date and Time.

4. To manually adjust the date and time, select Change date and time.

   You can also set the time zone with Change time zone.

5. To set up the system clock automatically, go to the Internet Time tab and select Change settings.

6. Make sure Synchronize with an internet time server is selected.

7. Choose OK on the Internet Time Settings screen, and then again on Date and Time to apply the settings.

If you're using Windows XP, make sure the w32time service is running to have it set your time automatically.

macOS

See our step-by-step, picture tutorial of these steps in our manually change the date and time on a Mac article.

Linux

Here's how to change the date and time in Linux:

• To change the time zone on Linux, make sure /etc/localtime is symlinked to the correct time zone from /usr/share/zoneinfo.

Time synchronization is also available for almost any other platform and operating system.