Understanding why a date in the 1800s is called the 19th century or why our current century is called the 21st century is confusing for my students. I created this poster in Microsoft Publisher to help my student see the pattern. I started with the first two centuries before jumping to more recent ones. I also included examples of some dates and their corresponding centuries. I left this as a Publisher document rather then a PDF so that a teacher could keep updating the current year. If you need it as a PDF, contact me and I can send you it to you in that format as well.