how to insert today's date automatically in post title

i have a website based on wordpress.... i want to add today's date automatically in post title.... example you can search on google lenovo k3 note price in india and you will see that many sites has added date which is latest

 

You can add a function to append DATE with Post Title.

function append_date ( $title ) {
.....
return $title;
}
add_filter( 'the_title', 'append_date');