Exact classical source
泽中有火，革。君子以治历明时。
Yarrow editorial translation. Fire within the lake: Revolution. Thus the noble person orders the calendar and makes the times clear.
Yarrow / Source Notes / 2026-07-17
Yarrow Image-to-Action note · 2026-07-17
Make the Changeover Legible Before It Begins
Read Hexagram 49 Ge through fire within the lake, then make a system change visible through one dated cutover and rollback card.
䷰
Hexagram 49 · Ge · Revolution
This page studies a supplied Xiang image. It does not claim this hexagram was cast for the modern scene.
Source image
Fire burns within a lake, placing opposed forces in one field where change cannot remain an invisible background condition.
Concrete tension
A system change has been announced, but affected users cannot find when the old state ends, when the new one starts, or how reversal works.
Visible modern action
Publish one dated change card with the old-state end time, new-state start time, named owner, exact rollback trigger, and review time. Put the same card in every affected channel before the cutover begins.
Why this action comes from this source
The source responds to transformation by ordering the calendar and clarifying time. The five-field card makes change inspectable before it arrives; repeating the same dated card across affected channels prevents the schedule from fragmenting into conflicting private versions.
Reflection question
Can every affected person find the same cutover and rollback times?
Audience value
Informative: the note supplies a reusable five-field change card that makes timing, ownership, reversal, and review visible.
Source boundary
The Chinese quotation is checked against Yarrow's bundled Yang Tiancai and Zhang Shanwen source text. Where that OCR witness substitutes a character, the page discloses the raw reading and checks the correction against a second classical witness. The English translation, objects, tension, and action are modern Yarrow editorial work. This is not a fresh cast, prediction, or promised outcome.