Dealing With Time Zones Using TimeZoneInfo In C#

using System;

namespace ConsoleApplication6
{
    class Program
    {
        static void Main(string[] args)
        {
            // Display the current time zone name.
            Console.WriteLine("Local time zone Name: {0}\n", TimeZoneInfo.Local.DisplayName);

            // Display the current time zone standard name.
            Console.WriteLine("Local time zone Standard Name: {0}\n", TimeZoneInfo.Local.StandardName);

            // Display the current time zone Daylight name.
            Console.WriteLine("Local time zone Daylight Name: {0}\n", TimeZoneInfo.Local.DaylightName);

            // Find whether the currently selected time zone supports daylight saving time.
            Console.WriteLine("Local time zone supports Daylight Saving Time: {0}\n", TimeZoneInfo.Local.SupportsDaylightSavingTime);
        }
    }
}

Output

Gets the time difference between Current TimeZone and Coordinated Universal Time (UTC)

To find the difference between the current time zone's standard time and the UTC, we use the BaseUtcOffset property of the TimeZoneInfo class.

using System;

namespace ConsoleApplication6
{
    class Program
    {
        static void Main(string[] args)
        {
            // Display the current time zone name.
            Console.WriteLine("Local time zone Name: {0}\n", TimeZoneInfo.Local.DisplayName);

            // Apply base UTC offset
            TimeZoneInfo localZone = TimeZoneInfo.Local;
            Console.WriteLine("The {0} time zone is {1}:{2} {3} than Coordinated Universal Time.",
                localZone.StandardName,
                Math.Abs(localZone.BaseUtcOffset.Hours),
                Math.Abs(localZone.BaseUtcOffset.Minutes),
                (localZone.BaseUtcOffset >= TimeSpan.Zero) ? "later" : "earlier");
        }
    }
}

Output

Determine the total number of TimeZones that our system supports

To find the total number of TimeZones that are present in our system we use the count property.

using System;
using System.Collections.ObjectModel;

namespace ConsoleApplication6
{
    class Program
    {
        static void Main(string[] args)
        {
            ReadOnlyCollection<TimeZoneInfo> zones = TimeZoneInfo.GetSystemTimeZones();
            Console.WriteLine("The local system has the following {0} time zones", zones.Count);
        }
    }
}

Output

Display all the current system's TimeZones using the ID property

We can also display the TimeZone by using the Id.

using System;
using System.Collections.ObjectModel;

namespace ConsoleApplication6
{
    class Program
    {
        static void Main(string[] args)
        {
            ReadOnlyCollection<TimeZoneInfo> zones = TimeZoneInfo.GetSystemTimeZones();
            Console.WriteLine("The local system has the following {0} time zones\n", zones.Count);
            
            foreach (TimeZoneInfo zone in zones)
            {
                Console.WriteLine(zone.Id);
            }
        }
    }
}

Output

Summary

In this article, I explain how to perform various operations on time zones using C#.