Get orders collection between a date range in magento 2.

We just need to pass start date and end date to get collection between Specific time in Magento 2. We need to filter created_at field using addAttributeToFilter(). Create Block file.
By default created_at field in  sales_order table represent the time of order creation in Magento 2.

namespace Rbj\Order\Block;

class OrderRange extends \Magento\Framework\View\Element\Template
    public function __construct(
        \Magento\Framework\View\Element\Template\Context $context,
        \Magento\Sales\Model\ResourceModel\Order\CollectionFactory $orderCollectionFactory,
        array $data = []
    ) {
        $this->orderCollectionFactory = $orderCollectionFactory;
        parent::__construct($context, $data);

    /* Order collection between start and end date */
    public function getOrderCollectionByDateRange(){
        $startDate = date("Y-m-d h:i:s",strtotime('2018-1-1')); // start date
        $endDate = strtotime("Y-m-d h:i:s", strtotime('2018-10-1')); // end date

        $orders = $this->orderCollectionFactory->create()
            ->addAttributeToFilter('created_at', array('from'=>$startDate, 'to'=>$endDate));
        return $orders;

Call Function from template file,

$orders = $block->getOrderCollectionByDateRange();

if($orders->getTotalCount() > 0) { 
    foreach($orders as $_order) {
        $orderId = $_order['increment_id'];
        echo "<pre>";print_r($_order);

You can get Order collection by date range by the above tricks.