01
Read and understand
Read calendar terms and the conversion handbook. Inventory the original information before deciding what extra sources are needed.
02
Practice
Create an input card for a fictional date, noting calendar, region, precision, sources and boundary conventions. Leave unknowns unknown.
03
Output and reflection
Output: a complete date-input card that lets another reader reproduce the time assumptions. Retain both possible dates where needed, identifying what evidence could resolve them.
Personal study record; not a grade, assessment or credential.
Editorial study material · 2026-09-28