Key:
BI=Before Invasion
AI=After Invasion

BI Turn 2525: AIVAS is discovered.
BI Turn 2540: The last Pass ends.
BI Turn 2570: The Valde invade Pern, killing four of the five Weyrs. Southern Weyr disappears in thin air.
AI Year 1: The Valde take full control of Pern.
AI Year 15: Southern Weyr finish their new Weyr in the Southern Barrier Mountains, naming it Hidden Mountain Weyr.
AI Year 49: Senior Weyrwoman Trella and Gold Laraniath die from the plague which killed over half of their dragons, including their Weyrleader, leaving the Weyrling Gold Sassath.
AI Year 52: Sassath rises and the new Weyrleader R’lan starts small raids on the caravans.
AI Year 97: After laying a clutch of fifteen eggs, Sassath goes between when her rider dies of another plague.
AI Year 97: Gold Zenziath Impresses Aslyn.
AI Year 99: Gold Zenziath Rises and is caught by Bronze Rayanth.
AI Year 100, Month 3: The Convict’s ship lands and the Convicts are discovered at Hidden Mountain Weyr. The egg-heavy queen is inserted with an injection to give her stronger and mutant eggs.
AI Year 100, Month 4: Gold Zenziath lays a nice maiden clutch of 28 eggs. It is unknown if she has a queen. Some of the eggs are huge, bigger than any Gold egg seen.
AI Year 100, Month 6: Zenziath's clutch hatches, with many different colors. The violent, but petite Saffrons, the multi-gender and joking Sangrias, the furred and caregiving Heliotropes, the powerful and technology powerful Malachites, the brilliant and rebellious Fuchsias, the vain and scaled Sapphire and the equality-loving and massive Indigo. Sapphire Aziath Impressed to the Convict HAD Rina Saito. The first Indigo, Garonth Impressed to R'li.
AI Year 101, Month 6: Zenziath's second clutch hatches with two new colors, the vicious and pyrokinetic Oranges and the cheerful and beautiful Alizarin queen. Shockingly enough, the Alizarin queen Njaeith Impressed to V'rs. The first watch-wher clutch hatches with new colors, the brilliant and gorgeous Thistle, the sneaky and dark Onyx, the loving and powerful Isabelline and the aggressive and tri-colored Octarine. The Octarine queen Risk, Impressed to Convict leader, Richard B. Riddick making him the Whermaster of Pern.
AI Year 103: Sapphire Aziath has her maiden Flight and is caught by Fuchsia Xytath. Octarine Risk has her first maiden Flight and is caught by Isabelline Saeask, making Saea the Head Wherhandler of Pern.
AI Year 103, Month 4: After some heavy discussion, construction of a second Weyr starts, with Rina becoming it's Senior Weyrwoman.
AI Year 103, Month 5: Sapphire Aziath lays a clutch of 27 eggs, including a Gold egg.
AI Year 103, Month 6: Sapphire Aziath's clutch hatches with two new colors. The small but brutal Charcoal and the thin but impressive Periwinkles. The Gold queen Pamiath Impressed to Convict Mason. The Charcoal queen Inannath Impressed to Magne. Risk lays a clutch of 27 eggs with a Gold egg.
AI Year 103, Month 7: The New Weyr is completed and dubbed Senkai Island Weyr.
AI Year 104, Month 4: Sapphire Aziath has her first clutch as Senior Queen and is caught by Indigo Polenth, making F'den the Weyrleader of Senkai Island Weyr.