Assuming you are running windows 10:
Right click on the time, in the task tray.
https://prnt.sc/ucs9niLeft click on Adjust Date/Time
https://prnt.sc/ucsa18Now that we have the Date & Time control panel open, there is a related setting we want to use, Date, Time, & regional formatting. Left click on that.
https://prnt.sc/ucsaijWith the region panel open, we want to change a data format
https://prnt.sc/ucsb0kLong date is the one to change. It has 4 possibilities, two have the day before the month, two are after, and for each pair one shows the day and the other does not.
https://prnt.sc/ucsc4uhttps://prnt.sc/ucsc9kAnother way to the same thing:
Open search
https://prnt.sc/ucsd78Type in Settings, like this:
https://prnt.sc/ucuiwoSelect the settings app, which gets us here:
https://prnt.sc/ucse14In the search bar, type in date:
https://prnt.sc/ucse9pSelect Change date and time formats
Long date is the one to change. It has 4 possibilities, two have the day before the month, two are after, and for each pair one shows the day and the other does not.
https://prnt.sc/ucsc4uhttps://prnt.sc/ucsc9kedit: noticed I'd used the same link twice, replaced the repeat with the correct one.