Source

File: wp-admin/includes/class-wp-community-events.php

protected function trim_events( $response_body ) {
		if ( isset( $response_body['events'] ) ) {
			$wordcamps = array();
			$today     = current_time( 'Y-m-d' );

			foreach ( $response_body['events'] as $key => $event ) {
				/*
				 * Skip WordCamps, because they might be multi-day events.
				 * Save a copy so they can be pinned later.
				 */
				if ( 'wordcamp' === $event['type'] ) {
					$wordcamps[] = $event;
					continue;
				}

				// We don't get accurate time with timezone from API, so we only take the date part (Y-m-d).
				$event_date = substr( $event['date'], 0, 10 );

				if ( $today > $event_date ) {
					unset( $response_body['events'][ $key ] );
				}
			}

			$response_body['events'] = array_slice( $response_body['events'], 0, 3 );
			$trimmed_event_types     = wp_list_pluck( $response_body['events'], 'type' );

			// Make sure the soonest upcoming WordCamp is pinned in the list.
			if ( ! in_array( 'wordcamp', $trimmed_event_types, true ) && $wordcamps ) {
				array_pop( $response_body['events'] );
				array_push( $response_body['events'], $wordcamps[0] );
			}
		}

		return $response_body;
	}