Add start time to widget

Not without modification.

Open up class-challonge-widget.php in the challonge plugin folder.

Go to line 210 and add the following code after line 210:

.date_i18n(get_option( 'date_format' ) . ' ' . get_option( 'time_format' ),strtotime( $tourny->{ 'start-at' } )+ ( get_option( 'gmt_offset' ) * 3600 )).'<br />'

After that the code should look like this:

$ret .= '<br /><span class="challonge-info">'
    .date_i18n(get_option( 'date_format' ) . ' ' . get_option( 'time_format' ),strtotime( $tourny->{ 'start-at' } )+ ( get_option( 'gmt_offset' ) * 3600 )).'<br />'
    . esc_html( $lnk->participants_count ) . '/' . $lnk->signup_cap
    . ' | ' . esc_html( ucwords( str_replace( '_', ' ', $tourny->state ) ) )
  . '</span>';
$ret .= '</li>';

Bear in mind that this modification will be overwritten after a plugin update.

Thank you! Can I convert it to 24h format or how I can format it to my preferences using this table https://codex.www.ads-software.com/Formatting_Date_and_Time ?

The format depends on your wordpress settings.

For 24h format you have to set the time format in the wordpress settings to G:i

If you do not want to change your wordpress settings I can have a look at the code if I can adjust it manually.

Edit:

Just replace the get_option( ‘time_format’ ) with ‘G:i’

The new code is

.date_i18n(get_option( 'date_format' ) . ' ' . 'G:i', strtotime( $tourny->{ 'start-at' } ) + ( get_option( 'gmt_offset' ) * 3600 )).'<br />'

That’s perfect! Thank you very much!