What we can do with date and time offset data

Question

see here we store offset. so tell me what is the importance of storing offset data along with date and time ?

what we can do with offset data if we store ?

public void DemoDateTimeOffset()

{

DateTimeOffset offsetValue = new DateTime(2017, 1, 21, 4, 34, 0);

using (SqlConnection cn = new SqlConnection(myConnection))

{

string commandText = @" INSERT INTO DateTimeDemo (DateTimeExample,DateTimeOffsetExample)

VALUES (@DateTimeExample,@DateTimeOffsetExample)";

using (SqlCommand cmd = new SqlCommand(commandText, cn))

{

cmd.Parameters.AddWithValue("@DateTimeExample", DateTime.Now);

cmd.Parameters.AddWithValue("@DateTimeOffsetExample", offsetValue);

cn.Open();

cmd.ExecuteNonQuery();

}

}

}

 

thanks