public function prev_url( $canonical = false, array $passthru_vars = [] ) {
		if ( isset( $this->prev_url ) ) {
			return $this->prev_url;
		}

		// Setup the Default date for the month view here.
		$default_date = 'today';
		$date         = $this->context->get( 'event_date', $default_date );
		$current_date = Dates::build_date_object( $date );

		if ( $this->skip_empty() ) {
			// Find the first event that starts before the start of this month.
			$prev_event = tribe_events()
				->by_args( $this->filter_repository_args( $this->setup_repository_args() ) )
				->where( 'starts_before', tribe_beginning_of_day( $current_date->format( 'Y-m-01' ) ) )
				->order( 'DESC' )
				->first();
			if ( ! $prev_event instanceof \WP_Post ) {
				return $this->filter_prev_url( $canonical, '' );
			}

			// Show the closest date on which that event appears (but not the current date).
			$prev_date = min(
				$prev_event->dates->start,
				$current_date->sub( new \DateInterval( 'P1M' ) )
			);
		} else {
			$prev_date = Dates::build_date_object( $current_date->format( 'Y-m-01' ) );
			$prev_date->sub( new \DateInterval( 'P1M' ) );
			// Let's make sure to prevent users from paginating endlessly back when we know there are no more events.
			$earliest = tribe_get_option( 'earliest_date', $prev_date );
			if ( $current_date->format( 'Y-m' ) === Dates::build_date_object( $earliest )->format( 'Y-m' ) ) {
				return $this->filter_prev_url( $canonical, '' );
			}
		}

		$url = $this->build_url_for_date( $prev_date, $canonical, $passthru_vars );

		$this->prev_url = $url;

		return $this->filter_prev_url( $canonical, $url );
	}