The almanacs documented Mystara in the years 1010-1013 AC. Although much of the information in the almanacs were reprinted material, they provided a timeline of events for each year.
| Code | Title | Description | Setting in Mystara | Cover |
| AC1010 | Poor Wizards's Almanac | Campaign Source | Explicit | |
| AC1011 | Poor Wizard's Almanac II | Campaign Source | Explicit | |
| AC1012 | Poor Wizards's Almanac III | Campaign Source | Explicit | |
| Joshuan's Almanac | Campaign Source | Explicit | |