How to simulate different timezones in Chrome
Jul 13, 2025 am 12:19 AM
To test page behavior in different time zones in Chrome browser, there are three ways to do it. 1. Use Chrome DevTools to simulate the time zone: Open DevTools → Click Three Dots → More Tools → Sensors, check the overwrite option in the Date and Time section and select the target time zone. This setting only takes effect in the current session; 2. Specify the time zone through the command line startup parameters: After closing all Chrome instances, execute chrome.exe --timezone="target time zone" to affect the entire browser instance; 3. Use JavaScript to overwrite the behavior of the Date object. Fixed time values are used to accurately control the JS time logic, suitable for debugging and automated testing. Just choose the appropriate method according to the usage scenario.
Want to test page behavior in different time zones in Chrome browser? In fact, the method is quite straightforward, especially suitable for international projects or debugging cross-regional functions. There is no need to install particularly complicated tools, just use the functions and some tips that come with the browser.
Simulate time zones with Chrome DevTools
Chrome's own developer tools (DevTools) support temporary modification of the browser's time zone, which is very useful for front-end debugging.
- Open DevTools: Shortcut key
F12or right-click the page to select "Check" - Click the three dots in the upper right corner → More Tools → Sensors
- Check "Override Geolocation" and "Override Date/Time" in the Date and Time section
- After checking, a drop-down box will appear, where you can directly select the time zone, such as Asia/Shanghai, America/New_York, etc.
Note: This setting only takes effect in the current DevTools session. Refreshing the page will retain the time zone you selected, but after closing DevTools, the default will be restored.
Specify the time zone through command line startup parameters
If you want the entire browser instance to run in a specific time zone instead of just emulating in DevTools, it can be done by starting parameters.
- Close all Chrome instances
- Find the installation path of Chrome (usually
C:\Program Files\Google\Chrome\Application\chrome.exeunder Windows) - Execute the command:
chrome.exe --timezone="Asia/Tokyo"
You can replace "Asia/Tokyo" with any IANA-supported time zone name.
This method is suitable for Windows, macOS, and Linux, but requires permission to start the browser from the command line. In addition, this method will affect the behavior of the entire browser, not just the current page.
Temporary simulation time with JavaScript
Sometimes you want to control the time objects obtained by JS, rather than the system time of the entire browser. At this time, you can use code to overwrite the behavior of the Date object.
For example:
const originalDate = Date;
Date = class extends Date {
constructor(...args) {
if (args.length === 0) {
super('2025-04-05T12:00:00Z'); // Fix one time} else {
super(...args);
}
}
};After writing this way, any place where new Date() is called will return the time you set, which is equivalent to forcing the "deception" page to think that now is a certain point in time. Suitable for automated testing or temporary debugging.
Basically these are the methods. Choose the right method according to your needs: simple debugging is the most convenient; long-term testing can be done using the command line; precise control of JS time logic depends on code rewriting Date. Several methods are not complicated, but they are particularly practical in actual development.
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