When you're working with one company or individual in another time zone, it becomes easy to convert your local time to the current time in their country. However, when doing business with multiple companies or people all over the globe, it's best to have a quick reference to see what their local time is. This can help you avoid calling someone at 7 a.m., and instead making the call at a more reasonable hour, like 10 a.m.
Windows allows you to set your local time by default, but also has options for enabling two additional clocks for other time zones. Here's how to add them:
Step 1: Click the current time in the system tray, and then click Change time and date settings.
Step 2: On the Additional Clocks tab, check one or both of the boxes next to Show this Clock.
Step 3: Select time zones and assign names to each clock, so you can easily spot which time corresponds to which place.
Once you're finished, click OK and your next clocks will be available after clicking the current time in the taskbar.
Having multiple clocks at your service is also helpful when you are traveling for business really often. Knowing the local time when you arrive somewhere can determine whether traveler resources will be available to you -- like other ticket counters for trains, places to eat, or even being able to get a taxi.