C# Code Snippet - Convert Unix timestamp

C# Code Snippet - Convert Unix timestamp

These C# code snippets convert given Unix timestamp to DateTime and given DateTime to Unix timestamp. Unix timestamp is a long integer containing the number of seconds between the Unix Epoch (January 1 1970 00:00:00 GMT) and the time specified.

This method converts a Unix timestamp to its DateTime equivalent. Method returns converted result as DateTime data type.

/// <summary>
/// Methods to convert Unix time stamp to DateTime
/// </summary>
/// <param name="_UnixTimeStamp">Unix time stamp to convert</param>
/// <returns>Return DateTime</returns>
public DateTime UnixTimestampToDateTime(long _UnixTimeStamp)
{
    return (new DateTime(1970, 1, 1, 0, 0, 0)).AddSeconds(_UnixTimeStamp);
}

This method converts a DateTime to its Unix timestamp equivalent. Method returns converted result as long data type.

/// <summary>
/// Methods to convert DateTime to Unix time stamp
/// </summary>
/// <param name="_UnixTimeStamp">Unix time stamp to convert</param>
/// <returns>Return Unix time stamp as long type</returns>
public long DateTimeToUnixTimestamp(DateTime _DateTime)
{
    TimeSpan _UnixTimeSpan = (_DateTime - new DateTime(1970, 1, 1, 0, 0, 0));
    return (long)_UnixTimeSpan.TotalSeconds;
}

Here are few simple examples showing how to use above methods (UnixTimestampToDateTime, DateTimeToUnixTimestamp) to convert date/time between DateTime and Unix timestamp.

// Convert current DateTime in Unix time stamp
Console.WriteLine("Current unix time stamp is : " + DateTimeToUnixTimestamp(DateTime.Now).ToString());

// convert Oct-07-1975 11:27 AM (15 Sec 37 MiliSec.) to Unix Time Stamp
Console.WriteLine("Oct-07-1975 11:27 AM (15 Sec 37 MiliSec.) to unix time stamp : " + DateTimeToUnixTimestamp(new DateTime(1975, 10, 7, 11, 27, 15, 37)).ToString());

// convert given Unix time stamp to DateTime and update dateTimePicker value
dateTimePicker1.Value = UnixTimestampToDateTime(181913235);

C# Keywords Used:

• TimeSpan
• DateTime
• UtcNow
• TotalSeconds

Code Snippet Information:

• Applies To: Visual Studio, .Net, C#, Date/Time, Timestamp, Unix Time, Unix Timestamp, Convert Unix Timestamp
• Programming Language : C#

External Resources:

• DateTime Structure
• TimeSpan Structure
• Unix time

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