The only thing I can suggest is changing the date of the post. 'December 31, 2010' becomes 'December 31, 2020' and make sure you click 'back date entry' because then it will always be at the top, and other entries will fall into place correctly.
One trick I've learned, is you post the entry normally then go back and edit to change the date and click the back date. Otherwise every post you make later tries to tell you there is one set in the future. Hope that helps!