"Web based DST testing site". Quick way to tell if your computer is DST ready for this weekend:

I created a web site that can detect if your computer will accurately spring ahead at the new, earlier time. It can tell if you are using current DST'07 rules, earlier DST rules, EU Summertime, no DST at all (like in non-Navajo areas of Arizona), or if it is unable to detect. It then shows the results in large Red, Yellow, or Green dots to be easy for end-users. -- Jeff Williams

(Via IPList.)