Changing the Copyright Message, full date

Hi there,

Add this snippet to create a shortcode:

add_shortcode( 'footer_date', 'lh_footer_date' );
function lh_footer_date() {
    ob_start();
    echo date('jS F Y');
    return ob_get_clean();
}

Then add this shortcode inside copyright message:
[footer_date]

Add this snippet to ... Where? What place?

One of these methods: https://docs.generatepress.com/article/adding-php/

Code Snippets is the easiest if you aren't using a plugin.

Leo it works ... thanks.
How may I switch the result "7th July 2018" to a German date "07.07.2018"?

Here it is:

add_shortcode( 'date', 'tu_term_description' );
function tu_term_description() {
    ob_start();
    echo date('d.m.Y');
    return ob_get_clean();
}

More info here: https://codex.wordpress.org/Formatting_Date_and_Time

Many thanks ... it works.

No problem!