Lets watch an demo picture below first.
As you can see the date in calender form before the post title,that is what i am talking about.If you liked it continue reading this tutorial.
First, go to Settings > Formatting, and change the date header format to YYYY-MM-DD like this:
This enables the script we will be using to correctly parse the date header format.
Now login to blogger > go to Blogger Layout > Edit/Html > Check mark expand Widgets >
Press Ctrl + F > And now search for below code
This above line you found will be wrapped in heading tags of or like below
Just what you have to do is make it wrap like this instead of using heading tags.
If you already find your codes wrapped like this then leave it its ok.Continue to next step.
Now search for tag and place the below codes immediately before it.