Hello
use it like that:
$args = array(
'title' => __('Archives'), // Title of the widget
'next_text' => '?', // next button text
'prev_text' => '?', // previous button text
'post_count' => 1, // show post count for months
'month_view' => 0, // 1 => show months instead of years
'month_select' => 'default', // prev, current, next
'different_theme' => 0, // set a different theme for this widget regardless on plugins settings
'theme' => null, // theme to set if different_theme = 1 // "calendrier"/"pastel"/"classiclight"/"classicdark"/"twentytwelve"/"twentyfourteen"/"twentythirteen" or "arw-theme1"/"arw-theme2" for custom themes
'post_type' => array(), // array("post", "message", "forum") ...
'categories' => null // array(2, 3, 4, 5); list cathegories id number you want to show on calendar
);
the_widget( 'Archives_Calendar', $args);
If you don’t set all of the parameters you can remove them, default parameters will be set instead. (‘title’ is required):
$args = array(
'title' => __('Archives'),
'post_count' => 0
);
the_widget( 'Archives_Calendar', $args);