Customizing the post date

Try this:

.posted-on:before {
    content: 'Taken on ';
}

Perfect! Thanks!!

You're welcome

Hi again David!

How can I also change this for the list created with show posts on this page? https://snapbangladesh.com/stories/

I need this line to be the same format as the single posts like this: http://prntscr.com/nyf7yg

Try this:

.wp-show-posts-entry-meta {
    display: flex;
    flex-direction: row-reverse;
    justify-content: flex-end;
}
.wp-show-posts-separator {
    display: none;
}
.wp-show-posts-byline:before {
    content: '\00a0 by ';
}
.wp-show-posts-posted-on:before {
    content: ' Taken on ';
}

Awesome! Thanks a million!! :)

You're welcome