Hi Raj. When signed into Word Press, click on Post (one of the icons on the left of the screen.
Then take the cursor over your the title of your post and you will see a number of icons show. Click on quick edit and a screen comes up where you can adjust the date to anyone you want. Then look towards to your right where you will see “update” icon and click on it once you are done.
[Moderator removed spam link – Please don’t spam.]
