The difference is exactly 2 hours (7200 seconds) so it looks like a timezone issue. Check DateTime.ToLocalTime() and DateTime.ToUniversalTime() functions for possible solution. Jarek ----- Original Message ----- From: "Philipp Kern" <phil@philkern.de> To: <mono-list@lists.ximian.com> Sent: Monday, August 30, 2004 3:59 PM Subject: [Mono-list] Using UNIX timestamps with Mono/C#