A year in the title generally indicates that what is being linked to is as it was in the year specified. Usually, a blog post is static and easy to apply a year to but front pages of ongoing projects may have new information or changes that make it harder to label with a year. If a particular project is finished then applying a year to the title could make sense but most people don't bother to look into what year that should be, and in some cases may be subjective.