If you do not know, check with your browsers home page. Here are links to the two most popular browsers. For Netscape click here. For Microsoft click here. If you are using another Operating system like Macintosh, check you user's manual.
Most people have their task bar at the bottom.
If you do not see a time clock, right click in the area shown below on your task bar and select properties. You can set the correct date, time and time zone here. If this does not work check the questions at the beginning of the page and check your manual.