I'm trying to translate the post date using __() function. But it is not working. The post date still displayed in English.

What are you the other options to localize the post date(posted-on). Please help me. thank you.

printf(__('<span class="posted-on"><a href="%1$s" title="%2$s" rel="bookmark"><i class="fa fa-clock-o"></i> %3$s</a></span>', 'colormag'), esc_url(get_permalink()), esc_attr(get_the_time()), $time_string );