Question: how to change date format to 12 hours in windows 10?
Answer: Right-click on the taskbar clock and select “Adjust date and time”. This will open the Settings app on the “Data & time” page. ... 
Click “Change data formats” at the bottom of the page. Here you can change the short and the long time displays to be in the 12-hour format. ... 
Select the 12-hour clock variant you prefer.