If changing the wallpaper doesn’t bring the clock back, try changing the theme of your PC. You can also right-click on the desktop and Personalize from the menu. To do this, go to Settings> Personalization> Wallpaper. All you need to do is change the background. Sometimes the Windows background is damaged resulting in the invisible clock on the taskbar. If the clock is there, but it’s dimmed or shaded, making it difficult to see the date and time, here’s what to do.
You can also right-click anywhere on the taskbar and select Taskbar Settings. If it is on then turn it off and on again. Step 4: On the next screen, make sure that Clock is turned on. Step 3: Scroll down and click on ‘Turn system icons on or off’.