The diary is broken out in 20 year increments:
Years 2400 - 2420
Years 2421 - 2440
Years 2441 - 2460
Years 2461 - 2480
Years 2481 - 2500
Years 2400 - 2420Years 2421 - 2440Years 2441 - 2460Years 2461 - 2480Years 2481 - 2500