1. Open Settings.
2. Click on Time & language.
3. Click on Date & time.

4. Under format click the Change date and time formats link.

5. Use the Short name drop-down menu to select the date format you want to see in the Taskbar.

6. Use the Short time drop-down menu to select the time format you want to see in the Taskbar

7. Close the Settings app to complete the task.

While you can change various date and time formats using the Settings app, you'll notice that you can't add custom formats. If you want to format the date and time with something more unique, you'll need to use Control Panel.

1. Open Control Panel.
2. Click on the Clock, Language, and Region link.
3. Click on the Change date, time, or numbers formats link.
4. Under the Formats tab, click on the Additional settings button.

5. Click on the Time tab.

6. Under "Time formats," you'll notice that now you can change various aspect of the time format.

7. Click Apply.

8. Click on the Date tab.

9. Under "Date formats," you'll notice there is more flexibility to change the date format.

10. Click Apply.

11. Click OK.

12. Click Apply again.

13. Click OK on more time to complete the task.

Once you completed the steps, you should see the new formats immediately in the taskbar.