We have a nice looking timeline styled completely with CSS, but what happens if the visitor doesn’t have CSS enabled? Since we used unordered lists, we still have a nicely accessible list of events. What makes this even more useful is that I put the dates in parenthesis after the label for the timeline block. I would suggest doing this as it will help with accessibility, you can always hide the dates if you don’t want them with CSS later using the display: none; property.