Add Clocks for Additional Time Zones in Windows 10

Windows 10 allows you to have up to three clocks. By default, the operating system shows the clock for your locale, that is, the local time in the calendar popup and in the taskbar. Here is how to add two additional clocks with different time zones in Windows 10.

Additional clocks can be useful for people who need to track the time in other places with different time zones. In Windows 10, you can configure the time zone for additional clocks individually but the user interface has changed compared to earlier releases of Windows. Once you add additional clocks, they will be visible in the Calendar flyout in Windows 10. Let's see how to configure them.

To add additional clocks in Windows 10, do the following.

Open Settings and go to Time & language category.

There, select Date & time on the left.

Under Related settings on the right, click on the link Add clocks for different time zones.

The following dialog window will appear:

Tick the option Show this clock for the first clock and configure its time zone. You can change its name if you want. The name you specified will be shown in the calendar flyout.

Now, configure the second clock if required. Select its time zone and set the name you want for the clock.

Now, click the date at the end of the taskbar to open the calendar flyout. Now it will display additional clocks.

Before:

After:

If you need to configure additional clocks with the Registry for automation purposes, you need to do it as follows.

Navigate with the Registry editor app to the following key:

HKEY_CURRENT_USER\Control Panel\TimeDate\AdditionalClocks\1

By default, the subkeys TimeDate, AdditionalClocks and 1 do not exist, so you need to create them manually.

Under the 1 subkey you created, create a new 32-bit DWORD value called Enable and set its value data to 1.

Now create a new string value named DisplayName and set it to any desired name which will be used in the calendar flyout.

Finally, create the TzRegKeyName string value and specify its value data as one of the following time zone strings:

Afghanistan Standard Time
Alaskan Standard Time
Arab Standard Time
Arabian Standard Time
Arabic Standard Time
Argentina Standard Time
Atlantic Standard Time
AUS Central Standard Time
AUS Eastern Standard Time
Azerbaijan Standard Time
Azores Standard Time
Bahia Standard Time
Bangladesh Standard Time
Belarus Standard Time
Canada Central Standard Time
Cape Verde Standard Time
Caucasus Standard Time
Central America Standard Time
Cen. Australia Standard Time
Central Asia Standard Time
Central Brazilian Standard Time
Central Europe Standard Time
Central European Standard Time
Central Pacific Standard Time
Central Standard Time
Central Standard Time (Mexico)
China Standard Time
Dateline Standard Time
E. Africa Standard Time
E. Australia Standard Time
E. Europe Standard Time
E. South America Standard Time
Eastern Standard Time
Eastern Standard Time (Mexico)
Easter Island Standard Time
Egypt Standard Time
Ekaterinburg Standard Time
Fiji Standard Time
FLE Standard Time
Georgian Standard Time
GMT Standard Time
Greenland Standard Time
Greenwich Standard Time
GTB Standard Time
Hawaiian Standard Time
India Standard Time
Iran Standard Time
Israel Standard Time
Jordan Standard Time
Kaliningrad Standard Time
Korea Standard Time
Libya Standard Time
Line Islands Standard Time
Magadan Standard Time
Mauritius Standard Time
Middle East Standard Time
Montevideo Standard Time
Morocco Standard Time
Mountain Standard Time
Mountain Standard Time (Mexico)
Myanmar Standard Time
Namibia Standard Time
Nepal Standard Time
New Zealand Standard Time
Newfoundland Standard Time
North Asia East Standard Time
North Asia Standard Time
N. Central Asia Standard Time
Pacific SA Standard Time
Pacific Standard Time
Pacific Standard Time (Mexico)
Pakistan Standard Time
Paraguay Standard Time
Romance Standard Time
Russia Time Zone 3
Russia Time Zone 10
Russia Time Zone 11
Russian Standard Time
Samoa Standard Time
South Africa Standard Time
SA Eastern Standard Time
SA Pacific Standard Time
SA Western Standard Time
SE Asia Standard Time
Singapore Standard Time
Sri Lanka Standard Time
Syria Standard Time
Taipei Standard Time
Tasmania Standard Time
Tokyo Standard Time
Tonga Standard Time
Turkey Standard Time
US Eastern Standard Time
US Mountain Standard Time
UTC
UTC-02
UTC-11
UTC+12
Venezuela Standard Time
Vladivostok Standard Time
West Asia Standard Time
W. Australia Standard Time
W. Central Africa Standard Time
W. Europe Standard Time
West Pacific Standard Time
Yakutsk Standard Time

This will enable the first clock.

To enable the second clock, repeat the steps above under the following Registry key:

HKEY_CURRENT_USER\Control Panel\TimeDate\AdditionalClocks\2

That's it.