All dates are in Labyrinth Years, as counted based on the Gate Descriptors, which uses years of exactly 365 days, 24 hours (without leap years)

1LY ● All the internal Gates (as measured so far) open up between zones (Arena 3).

1LY, 13 days, 7 hours ● Earth-802 Divergence opens up in 1369AD; Tang Feng and others become the supposed first High Lords of the Labyrinth (Arena 3).

1LY, 15 days ● Earth-96 Divergence opens up (Arena 3).

6LY ● Earth-311 divergence opens up (Arena 4).

105LY ● A full team of High Lords led by Tang Feng exploring a trunk zone stumbles upon the tier 11 nexus zone of Panomekon. They designated their entrance "Alpha" (Facets).

108LY ● The first permanent residence is established in Panomekon (Facets).

112LY ● An independent team of High Lords led by Appolonius Rhagabe arrives through the "Beta" Gate in Panomekon (Facets).

119LY ● A trio of High Lords including Caireach ni Hragain makes it through the "Gamma" Gate in Panomekon; the Panomekon Library is established to share information between branches (Facets).

162LY ● High Lords in the "Beta" sheaf discover the tier 12 Hallowskon nexus at the Blue Gate and realizes the apparent topology of the Labyrinth in "independent branches" (Arena 4).

178LY ● High Lords in the "Gamma" sheaf arrive in Hallowskon through the last unexplored Red Gate, confirming the double connection (Arena 4).

190LY ● Earth-88 Divergence opens up in 1752BC, Ahati Waqrat and a number of Marduk priestesses become Lords of the Labyrinth.

211LY ● Earth-570 Divergence opens up on Nov 9th, 1918AD, the last recorded date of True History; Johann Haussegger and a few WW1 veterans get stranded for 5 years in the Labyrinth (Arena 1).

212LY ● Earth-393 Divergence opens up in 1868AD; Maphikeleli is stranded solo in Earth-410's general area (Afterlives).

225LY ● Earth-209 Divergence opens up in 1262AD; Hroskell Guthrumsson becomes Lord of the Labyrinth.

238LY ● Earth-809 Divergence opens up in 1120AD; Pierrin de Bellievre becomes Lord of the Labyrinth.

251LY ● First use of the Arena structure in Panomekon to host a competition "to the Death" between High Lords.

289-296LY ● "The Fortress" is created by massive disruption and forced restructuring of the Labyrinth by a team of fanatics. Rebel teams are systematically hunted until no one associated remains at large (Book 4 - Prologue).

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304LY ● First "minor nexus" found in tier 15, all three of its Gates are confirmed connecting to the same general sector; its existence leads to the theory of possible direct connections between major nexus sectors or "sheaves".

318LY ● Earth-1882 Divergence opens its five Gates within one mile of each other at Susa III in 2880BC; the earliest recorded date of True History (Book 4 - Prologue).

330LY ● A tier 13 team finds Maphikeleli and escorts him to Panomekon; he renames himself as Victorious Traveller aka "Mhambi Meshindi" (Afterlives).

336LY ● A team of Lombard warriors attempts to use an unopened Gate to find Atlantis; force the Gate open into the Thera volcano as it begins eruption. The events are only reconstructed later (Book 4 - Prologue).

341LY ● The Council of Panomekon decides to police the various Divergences to avoid interference with the Labyrinth infrastructure. A cooperative effort is established with various nexuses to extend the policing to the larger Labyrinth "in case".

345LY ● Hroskell Guthrumsson is tasked to form a new Primary Inquisition team for supervising the various Alpha Divergences, recruits Ahati-waqrat, Johann Haussegger, Pierrin de Bellievre as core members.

352LY ● Earth-410 Divergence opens up in 90BC (Book 3 - Ctesiphon).

378LY ● The first High Lords break into tier 20 zones in Green sheaf beyond Hallowskon.

379LY ● A team of the Alpha Progression Society High Lords break into tier 20 zones.

381LY ● A team exploring a trunk discovers a trunk Gate leading to a NULL zone. No one ever hears of them again (The NULL Gate).

385LY ● Compilation of tier 20 zones lead to the realization that all of those follow the same scheme of 20 normal lairs, plus extra Major lairs, blocking further progress into tier 21 until a raid can break the stalemate; people start to call it "The Wall" (Arena 3).

390LY ● A tier 14 team including Mhambi Meshindi notices that proto-Gates for Earth-113 have materialized. The Zulu murders his team to keep the finding confidential for his own purpose (Book 3 - Isandhlwana).

391LY ● Mhambi Meshindi forces Earth-113's Gates open 47 years in advance and diverts one to the site of the future battle of Ishandlwana in Zululand; the only persons of that Divergence becoming Lords are a couple in Versailles Gardens who are stranded in a distant sheaf (Book 3 - Isandhlwana/Book 2 - 18 Pluviose).

397LY ● The idea of making sure fresh Lords are aware of the Adjustment Death Trap and avoid it if possible become official policy; monitoring new Divergences' opening to find their new Lords becomes an additional task for the Inquisition.

404LY ● Earth-1445 Divergence opens up in 225BC (Displaced).

405LY ● Earth-222 Divergence opens up in 799AD; Frobhlaith Amhránaí becomes Lord of the Labyrinth (Learning to be Yourself).

406LY ● Earth-701 Divergence opens up in 1233AD; the Akamatsu twins and another Japanese get stranded in Earth-1445's general area before being rescued by Ahati-Waqrat (Displaced).

406LY ● Guthrumsson's Inquisition Team on a mapping expedition discovers the two Lords from Earth-113 and escort them to Panomekon (Book 3 - Orphans).

409LY ● French saboteurs destabilize Earth-113's London Gate; 6 people are caught in the backlash and stranded in a moderately distant zone (Book 1 - The Queen's Gardens).

409LY ● Alpha Primary Inquisition team intervenes on Earth-410 for a violation of Gate Integrity Protocols (Book 3 - Ctesiphon).

410LY ● The Panomekon council becomes aware of a serious anomaly linked to Earth-113 (Book 4 - Prologue).

411LY ● Mhambi Meshindi is killed by a coalition of Earth-113's top Professionals (Book 4 - Wise Counsel).

448LY ● The Wall is finally breached in a race between the Alpha Progression Society of Panomekon and the Red Association of Hallowskon (Wall Breakers).

459LY ● Earth-139 Divergence opens up in 2018AD (Book 5 - Divergence).