Last modified date on post

I had added the following code to fuctions.php and also tried code snippets plugin
function show_last_modified_date( $content ) {
$original_time = get_the_time('U');
$modified_time = get_the_modified_time('U');
if ($modified_time >= $original_time + 86400) {
$updated_time = get_the_modified_time('h:i a');
$updated_day = get_the_modified_time('F jS, Y');
$modified_content .= '<p class="last-modified">This post was most recently updated on '. $updated_day . '</p>';
}
$modified_content .= $content;
return $modified_content;
}
add_filter( 'the_content', 'show_last_modified_date' );

but instead of showing “last updated date” on post templete; it shows last updated date on the very top of all the pages and posts.
Is there any way to display “last modified date” only on “single post template 15” below the published date(see in image).
https://lastdna.com/elephants-without-tusks/

@calin Which file should I edit for single post templete 15?

I’m using td cloud template, single post template 15.
I want to show:
1. “Last modified on” date on each post.
2. Also, I don’t want to remove “published date”.
3. Which file’s code should I edit to show the both “last modified on ” & “published on”.
Hope you understand.
Please see the images attached in above topic.

Sorry to say that but you are not understanding my problem.
Problems:-
1.Post template , It shows “Published Date”.
2. I want to show both “Published Date” and the “Last Modified date.
Solutions for:-
1. How can I show “Last modified” date without replacing the “Published date”.
2. I want to show “Last modified” date below the “Published date”.
If it is not possible then I want to show the “Last Modified” date on the top of “post content”.
Please provide the required code.
I am using td cloud library: single template 15.
Thanks,
Hope you understand my problem and try your best to solve my problem.

Hi,

That modification will replace the publish date with the last updated date. If you wish to have both don’t replace the code, add the publish date code below the default code. Just as Bogdan mentioned in another topic.

Like this example for post template 2
– https://www.screencast.com/t/B76LhZOm3
– https://www.screencast.com/t/Isu8pBty6pAw
You can add some more design if needed.

Thanks