How to Convert Unix Timestamp to DateTime in C#

C# Get unix timestamp

To get the Unix timestamp (the number of seconds since January 1, 1970) in C#, you can use the DateTimeOffset class.

For example:

// Get the current time as DateTimeOffset
DateTimeOffset currentTime = DateTimeOffset.Now;

// Unix epoch (January 1, 1970)
// c# epoch to datetime
DateTimeOffset unixEpoch = new DateTimeOffset(1970, 1, 1, 0, 0, 0, TimeSpan.Zero);

// Get the Unix timestamp (seconds since the Unix epoch)
long unixTimestamp = (long)(currentTime - unixEpoch).TotalSeconds;
// c# timestamp
Console.WriteLine($"Current Unix timestamp: {unixTimestamp}");

C# Convert epoch to datetime

In C#, you can convert an epoch timestamp (which is usually the number of seconds since January 1, 1970, also known as Unix epoch) to a DateTime object using the DateTimeOffset class or directly using DateTime.

For example, Using DateTimeOffset:

long epoch = 1615285000; // Example epoch time
DateTimeOffset dateTimeOffset = DateTimeOffset.FromUnixTimeSeconds(epoch);
DateTime dateTime = dateTimeOffset.DateTime;

Console.WriteLine(dateTime);  // Outputs the corresponding DateTime

For example, Using DateTime

If you prefer to use DateTime instead of DateTimeOffset, you can use this method:

long epoch = 1615285000; // Example epoch time
DateTime dateTime = new DateTime(1970, 1, 1).AddSeconds(epoch);

Console.WriteLine(dateTime);  // Outputs the corresponding DateTime

Both of these methods will convert the Unix timestamp (epoch) into a DateTime object that you can use for date/time manipulation in your application.

How to Convert Unix Timestamp to DateTime in C#?

For example, c# datetime from unix timestamp

// convert timestamp to date c#
long unixTimestamp = 1626012000; // Replace with your Unix timestamp

// c# convert unix timestamp to datetime
DateTime dateTime = DateTimeOffset.FromUnixTimeSeconds(unixTimestamp).DateTime;

This method uses DateTimeOffset.FromUnixTimeSeconds to convert a Unix timestamp to a DateTime object.

For old version .NET you can use DateTime.FromFileTimeUtc

// Example Unix timestamp
long unixTimestamp = 1626012000; // Replace with your Unix timestamp

// convert timestamp to datetime c#
DateTime epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
// unix timestamp to date c#
DateTime dateTime = epoch.AddSeconds(unixTimestamp);

We calculates the Unix timestamp based on the number of seconds since the Unix epoch (January 1, 1970).