Uses http://babakhani.github.io/PersianWebToolkit/doc/datepicker/playground.html

datepicker-persian.php

<?php 
/**
 * PHP Grid Component
 *
 * @author Abu Ghufran <gridphp@gmail.com> - http://www.phpgrid.org
 * @version 2.0.0
 * @license: see license.txt included in package
 */

// include db config
include_once("../../config.php");

// include and create object
include(PHPGRID_LIBPATH."inc/jqgrid_dist.php");

// Database config file to be passed in phpgrid constructor
$db_conf = array( 	
					"type" 		=> PHPGRID_DBTYPE, 
					"server" 	=> PHPGRID_DBHOST,
					"user" 		=> PHPGRID_DBUSER,
					"password" 	=> PHPGRID_DBPASS,
					"database" 	=> PHPGRID_DBNAME
				);

$g = new jqgrid($db_conf);

$col = array();
$col["title"] = "Id";
$col["name"] = "id";
$col["width"] = "25";
$col["frozen"] = true;
$cols[] = $col;		

$col = array();
$col["frozen"] = true;
$col["title"] = "Date";
$col["name"] = "invdate"; 
$col["width"] = "150";
$col["editable"] = true; // this column is editable
$col["editoptions"] = array("size"=>20, "defaultValue" => date("d.m.Y")); // with default display of textbox with size 20
$col["editoptions"]["dataInit"] = "function(o){ load_persiandate(o) }";
$col["editrules"] = array("required"=>true, "edithidden"=>true); // and is required
$cols[] = $col;

$col = array();
$col["title"] = "Client";
$col["name"] = "client_id";
$col["dbname"] = "c.name"; // this is required as we need to search in name field, not id
$col["width"] = "500";
$col["align"] = "left";
$col["search"] = true;
$col["editable"] = true;
$col["edittype"] = "select"; // render as select
$str = $g->get_dropdown_values("select distinct client_id as k, name as v from clients");
$col["editoptions"] = array("value"=>":;".$str); 
$col["formatter"] = "select"; // display label, not value
$cols[] = $col;

$col = array();
$col["title"] = "Note";
$col["name"] = "note";
$col["sortable"] = false; // this column is not sortable
$col["search"] = false; // this column is not searchable
$col["editable"] = true;
$col["edittype"] = "textarea"; // render as textarea on edit
$col["editoptions"] = array("rows"=>2, "cols"=>20); // with these attributes
$cols[] = $col;

$col = array();
$col["title"] = "Total";
$col["name"] = "total";
$col["width"] = "50";
$col["editable"] = true;
$cols[] = $col;

$col = array();
$col["title"] = "Closed";
$col["name"] = "closed";
$col["width"] = "50";
$col["editable"] = true;
$col["edittype"] = "checkbox"; // render as checkbox
$col["editoptions"] = array("value"=>"1:0"); // with these values "checked_value:unchecked_value"
$col["formatter"] = "checkbox";
$cols[] = $col;


$grid["width"] = 800; // by default 20
$grid["rowNum"] = 10; // by default 20
$grid["sortname"] = 'id'; // by default sort grid by this field
$grid["sortorder"] = "desc"; // ASC or DESC
$grid["caption"] = "Invoice Data"; // caption of grid
$grid["multiselect"] = false; // allow you to multi-select through checkboxes

$grid["form"]["position"] = "center";  // position form dialog to center
$grid["form"]["nav"] = true;  // show form navigation

$grid["export"] = array("format"=>"pdf", "filename"=>"my-file", "heading"=>"Invoice Details", "orientation"=>"landscape", "paper"=>"a4");

// modal should be false, if you are using more than 1 datepicker/timepicker controls 
// $grid["add_options"]["modal"] = false;
// $grid["edit_options"]["modal"] = false;

$g->set_options($grid);

$g->set_actions(array(	
						"add"=>true, // allow/disallow add
						"edit"=>true, // allow/disallow edit
						"delete"=>true, // allow/disallow delete
						"rowactions"=>true, // show/hide row wise edit/del/save option
						"export"=>true,
						"search" => "advance", // show single/multi field search condition (e.g. simple or advance)
						"showhidecolumns" => false
					) 
				);

// you can provide custom SQL query to display data
$g->select_command = "SELECT i.id, invdate, c.client_id,
						i.note, i.total, i.closed FROM invheader i
						INNER JOIN clients c ON c.client_id = i.client_id";

// this db table will be used for add,edit,delete
$g->table = "invheader";

// pass the cooked columns to grid
$g->set_columns($cols);

// generate grid output, with unique grid name as 'list1'
$out = $g->render("list1");
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html>
<head>
	<link rel="stylesheet" type="text/css" media="screen" href="../../lib/js/themes/redmond/jquery-ui.custom.css">	
	<link rel="stylesheet" type="text/css" media="screen" href="../../lib/js/jqgrid/css/ui.jqgrid.css">	
	<script src="../../lib/js/jquery.min.js" type="text/javascript"></script>
	<script src="../../lib/js/jqgrid/js/i18n/grid.locale-en.js" type="text/javascript"></script>
	<script src="../../lib/js/jqgrid/js/jquery.jqGrid.min.js" type="text/javascript"></script>	
	<script src="../../lib/js/themes/jquery-ui.custom.min.js" type="text/javascript"></script>

	<link rel="stylesheet" type="text/css" media="screen" href="../../lib/js/jqgrid/css/ui.jqgrid.css">

	<!-- The datepicker required the base and the "plus" module -->
	<link href="//cdn.jsdelivr.net/gh/babakhani/pwt.datepicker@master/dist/css/persian-datepicker.css" rel="stylesheet" type="text/css" />
	<script type="text/javascript" src="//cdn.jsdelivr.net/gh/babakhani/PersianDate@master/dist/persian-date.min.js"></script>
	<script type="text/javascript" src="//cdn.jsdelivr.net/gh/babakhani/pwt.datepicker@master/dist/js/persian-datepicker.min.js"></script>
	<script>
	function load_persiandate(o)
	{
		// customize calendar using http://babakhani.github.io/PersianWebToolkit/doc/datepicker/playground.html
		// and click on get configuration for parameter objects
		jQuery(o).persianDatepicker(

				{
				"inline": false,
				"format": "LLLL",
				"viewMode": "day",
				"initialValue": true,
				"minDate": 1542864864275,
				"maxDate": 1543815264311,
				"autoClose": false,
				"position": "auto",
				"altFormat": "lll",
				"altField": "#altfieldExample",
				"onlyTimePicker": false,
				"onlySelectOnDate": false,
				"calendarType": "persian",
				"inputDelay": 800,
				"observer": false,
				"calendar": {
					"persian": {
					"locale": "fa",
					"showHint": false,
					"leapYearMode": "algorithmic"
					},
					"gregorian": {
					"locale": "en",
					"showHint": false
					}
				},
				"navigator": {
					"enabled": true,
					"scroll": {
					"enabled": true
					},
					"text": {
					"btnNextText": "<",
					"btnPrevText": ">"
					}
				},
				"toolbox": {
					"enabled": true,
					"calendarSwitch": {
					"enabled": true,
					"format": "MMMM"
					},
					"todayButton": {
					"enabled": true,
					"text": {
						"fa": "امروز",
						"en": "Today"
					}
					},
					"submitButton": {
					"enabled": true,
					"text": {
						"fa": "تایید",
						"en": "Submit"
					}
					},
					"text": {
					"btnToday": "امروز"
					}
				},
				"timePicker": {
					"enabled": true,
					"step": 1,
					"hour": {
					"enabled": true,
					"step": null
					},
					"minute": {
					"enabled": true,
					"step": null
					},
					"second": {
					"enabled": true,
					"step": null
					},
					"meridian": {
					"enabled": true
					}
				},
				"dayPicker": {
					"enabled": true,
					"titleFormat": "YYYY MMMM"
				},
				"monthPicker": {
					"enabled": true,
					"titleFormat": "YYYY"
				},
				"yearPicker": {
					"enabled": true,
					"titleFormat": "YYYY"
				}
				}

		);
	}
	</script>
</head>
<body>
	<div style="margin:10px">
	<?php echo $out?>
	</div>
</body>
</html>