Being punctual at work and meeting job deadlines is important, especially if you’re the head honcho, the big boss, or the office manager. That’s why it’s very important that your clock, particularly the ones displayed on your computer, is accurate — not late and not advanced. If you’re working with foreign clients or partners, it’s also a good practice to know what their current times are.
Windows 7 and Vista have a tool that lets you add two additional clocks to your computer. You can integrate two times zones from anywhere in the world. When this tool is activated, the computer will display three clocks when you click your PC’s taskbar time.
This application also allows you to synchronize your current Windows 7 or Vista time to one of the five Internet time servers. This way, your clock will be updated and matched to the more accurate time setting. The synchronization process can be done automatically on a daily basis.

There are several methods you can use to access this tool. For this illustration, we will perform the faster and more convenient procedure.
First, click your taskbar time.

Next, press Change date and time settings….

Vista will show you the basic Date and Time tab. What we’re after are the Additional Clocks and Internet Time tabs.

Go to Additional Clocks. In here, you can check the Show this clock checkboxes if you want to display extra clocks aside from your default time. You can also label it accordingly.
For example, we selected the GMT -08:00 time zone and named it Los Angeles. This is a good approach of keeping up and knowing the other places’ current times.
For your changes to take effect, press the Apply button.

When you click your taskbar time, it will now display three clocks.

The next tutorial is for synchronizing your clock with the Internet’s. To do this, hit the Internet Time tab and click Change settings….

Check Synchronize with an Internet time server and

select the server you want from the Server drop-down menu. For this illustration, we will pick the one from the National Institute of Standards and Technology (NIST).

After this, press Update now.

Depending on your Internet connection’s speed, the synchronization will just take less than three seconds to complete.

After the synchronization, click OK to close the Internet Time Settings window.

The main function of the clock-synch tool is that it makes your Vista time more accurate.
This is the time before the synchronization.

This is the time AFTER the synchronization.