DateTime formats
On the DOTNET-CLR Greg ask about DateTime formats across time zones. Recently Dan Rogers released an article on MSDN which addresses a few best practices. I advice to inspect the ISO/DIS 8601 standard up front. The trick is to work with Coordinated Universal Time (UTC) DateTime formats throughout your application AND to persist ONLY UTC aware DateTime formats. You should eventually localize the UTC format for presentation purposes. Work like a charm.