There is no question but that most reckoning is dated by Common Year (C.Y.), which system commenced when the Overking of Aerdy declared universal peace through the whole of the Great Kingdom. The chronology given below, however, includes five other calendars which were once used and are sometimes referred to in ancient writings. Some few nations still employ these superannuated reckonings, as do the more isolated elvenfolk.
| Common
Year |
(S.D.)
Suloise |
(O.C.)
Olven |
(B.H.)
Bakluni |
(F.T.)
Flannae |
(O.R.)
Oerid |
|
| |
5031 |
3978 |
2175 |
1666 |
160 |
Beginning of the Baklunish-Suloise Wars. |
|
5050 |
3997 |
2194 |
1685 |
179 |
First employment of humanoid mercenaries. |
| |
5058 |
4005 |
2202 |
1693 |
187 |
Oerid migrations east of peak point. |
|
5069 |
4016 |
2213 |
1704 |
198 |
Suloise migrations begin. |
| |
5094 |
4041 |
2238 |
1729 |
223 |
Invoked Devastation and Rain of Colorless Fire strike. |
|
5299 |
4246 |
2443 |
1934 |
428 |
Founding of the Kingdom of Aerdy |
| |
5406 |
4354 |
2550 |
2041 |
535 |
Battle of a Fortnight's Length. |
| 1 |
5516 |
4463 |
2660 |
2151 |
645 |
Overking crowned in Rauxes; frontiers of Great Kingdom reach Greyhawk City. |
| 213 |
5728 |
4675 |
2872 |
2363 |
857 |
Age of Great Sorrow commences. |
| 320 |
5835 |
4782 |
2979 |
2470 |
964 |
Nomads appear in North, outer dependencies of Aerdy gain sovereignity. |
| 356 |
5871 |
4818 |
3015 |
2506 |
1000 |
Kingdom of Nyrond established; Kingdom of Keoland at peak. |
| 437 |
5952 |
4899 |
3096 |
2587 |
1081 |
Turmoil Between Crowns. |
| 446 |
5961 |
4908 |
3105 |
2596 |
1090 |
Founding of the Iron League; Bandit Kings sack Trigol; Rise of the Sea Princes. |
| 461 |
5976 |
4923 |
3120 |
2611 |
1105 |
Demi-human realms of Ulek and Celene are affected. |
| 479 |
5994 |
4941 |
3138 |
2629 |
1123 |
Might of Iuz grows, humanoid invasions become common. |
| 498 |
6013 |
4960 |
3157 |
2648 |
1142 |
County of Urnst becomes Palatinate under Duchy of Urnst; Greyhawk becomes a free city. |
| 513 |
6028 |
4975 |
3172 |
2663 |
1157 |
Rise of the Horned Society; humanoids take Pomarj. |
| 563 |
6078 |
5025 |
3222 |
2713 |
1207 |
Bone March falls to humanoids. |
| 569 |
6084 |
5031 |
3228 |
2719 |
1213 |
Battle of Emridy Meadows - Horde of Elemental Evil scattered. |
| 573 |
6088 |
5035 |
3232 |
2723 |
1217 |
Scarlet Brotherhood first reported; Prince of Furyondy/Provost of Veluna kidnapped. |