posted and last updated DATE not showing

I have tons of serious errors on my Google Webmaster Tools about this issue!
So when I publish a post the date doesn’t show up only the “Last Updateed on” shows up I also want “both”
1.the publish
2.last updated date
to show up.

Currently the date turns up only when I Update any post.
P.S. I have intentionally changed the “posted on” to “updated on” and I want to stick to it.

My url is

Hi Amit Dua,

I hope you are well today and thank you for your question.

Could you please share the screenshot of your Google Webmaster errors so that i can better understand it and help you?

Kind Regards,