How to Define your Work Week in the Regional Settings using CSOM in SharePoint 2013 Online

In this blog you will see how to define your work week in the regional settings using CSOM in SharePoint 2013 Online.

Code Snippet: 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Security;
using System.Text;
using System.Threading.Tasks;
using Microsoft.SharePoint.Client;

namespace CSOMOffice365
{
    class Program
    {
        static void Main(string[] args)
        {

            string userName = "[email protected]";

            Console.WriteLine("Enter your password.");
            SecureString password = GetPassword();

            // ClienContext - Get the context for the SharePoint Online Site
            // SharePoint site URL - https://c986.sharepoint.com

            using (var clientContext = new ClientContext("https://c986.sharepoint.com"))
            {
                // SharePoint Online Credentials
                clientContext.Credentials = new SharePointOnlineCredentials(userName, password);

                // Get the SharePoint web
                Web web = clientContext.Web;

                // Regional Settings
                RegionalSettings regSet = web.RegionalSettings;
                // Work days: https://msdn.microsoft.com/en-us/library/microsoft.sharepoint.client.regionalsettings.workdays.aspx
                // Convert the binary value to decimal: 0110110  - 54
                regSet.WorkDays = 54;
                // First Day of Week: https://msdn.microsoft.com/en-us/library/microsoft.sharepoint.client.regionalsettings.firstdayofweek.aspx
                regSet.FirstDayOfWeek = 1;
                // First Week of Year: https://msdn.microsoft.com/en-us/library/microsoft.sharepoint.client.regionalsettings.firstweekofyear.aspx
                regSet.FirstWeekOfYear = 1;
                // Work Day Start Hour - https://msdn.microsoft.com/en-us/library/microsoft.sharepoint.client.regionalsettings.workdaystarthour.aspx
                regSet.WorkDayStartHour = 540;
                // Work Day End Hour - https://msdn.microsoft.com/en-us/library/microsoft.sharepoint.client.regionalsettings.workdayendhour.aspx
                regSet.WorkDayEndHour = 1020;

                // Update the regional Settings
                regSet.Update();

                // Execute the query to the server
                clientContext.ExecuteQuery();
            }
        }

        private static SecureString GetPassword()
        {
            ConsoleKeyInfo info;

            //Get the user's password as a SecureString
            SecureString securePassword = new SecureString();
            do
            {
                info = Console.ReadKey(true);
                if (info.Key != ConsoleKey.Enter)
                {
                    securePassword.AppendChar(info.KeyChar);
                }
            }
            while (info.Key != ConsoleKey.Enter);
            return securePassword;
        }
    }
}

Output