Change Blogger Date Formatting inside Blog Posts
Follow these easy steps:
1 Go to Blogger > Template > Backup your template
2 Click Edit HTML
3 Search for this layout tag
4 The above code will appear twice. Once for mobile view and once for desktop view. Replace it twice with this layout tag:
<i class='fa fa-clock-o'/><data:post.dateHeader/>
Note: The yellow highlighted code will show a clock Icon next to the date, if you don't want this FontAwesome icon then simply remove the yellow code.
5 Save your template and you are almost done!
6 Next go to Settings > Language and Formatting > Formatting
From the drop down menu next to the Date Header Format select the first option i.e. Nov 21, 2015:
You can choose any formatting of your choice, the last two options are also good. In our case we chose the format: Nov 21, 2015
7 Click the "Save Settings" button and you are all done!
Peace and blessings buddies :)