Chronology foundations laboratory
How Ancient Dates Are Constructed
A date is not rigorous merely because it has a year attached. This dossier separates external anchors, regnal conventions, calendar boundaries, textual witnesses, and model assumptions before converting ancient notices into BCE or CE dates.
Method
Ten controls before assigning a date
Calendar systems
Different clocks used in the same history
These are working historical reconstructions. They explain many synchronisms but should not be treated as universally explicit rules.
| System | Year-count method | Rigor boundary |
|---|
External control
Eight anchor cases
Project rule
The timeline may display one working year for sorting, but the dossier must identify whether that year is externally fixed, conventionally reconstructed, calendar-dependent, textually variant, schematic, or merely approximate.
Research base