What This Is
A single day striking the root of the ten-year arc. The 大运, the decade cycle, governs a ten-year stretch of a life and sets its broad direction. When the daily branch clashes the current decade's branch, this is 流日大运冲 — a micro-scale touch on the long cycle's root. 子平真诠 gives the principle: when a transit meets a clash, there must be a turning point. Here the turning point registers at day-scale, a small disturbance to the decade's foundation.
It is a frequent event, recurring every twelve days, and most of the time it is minor. Its significance concentrates at the decade's pivots.
When It Fires
It fires when the daily branch forms a 六冲 with the current decade branch — once every twelve days. It is especially salient at the decade's transition phases: the opening of a new decade, the closing of an old one, and the mid-decade points where the long cycle shifts its character.
What It Changes
It surfaces day-scale events tied to the decade's direction. Because the decade governs the long arc of career, residence, and life-phase, a daily clash to its root tends to bring small triggers in exactly those domains — a day where something connected to the larger trajectory stirs: a professional move surfaces, a question of where one lives comes up, a relationship phase nudges forward. The scale is micro, but the theme is the decade's own.
Away from the decade's turning points, these are minor ripples. Near a transition, the same daily clash can mark the precise day a long-building shift announces itself.
How To Read It
Read it by where the decade stands. Mid-stream in a stable decade, the daily clash is a small ripple — a day with a faint pull toward decade-themed matters, easily passed. At a decade pivot, the same clash gains weight: it can mark the day a transition becomes concrete, the long cycle's change finding a specific date to surface on.
Direction follows the chart: a clash weakening the support a favorable decade provides reads as a small drag, while one opening room in an unfavorable decade reads as a small relief. Never flat — the daily decade-clash is weighed against whether the decade serves the chart and how near its turning points the day falls.
Where This Shows Up
A day of this kind is felt, when felt at all, as a small stirring of the long themes — a flicker of the career question, the residence question, the life-phase question that the decade carries. Most such days pass without much notice, minor ripples on the ten-year root.
Near the decade's edges, the texture sharpens: the daily clash can be the day a long-anticipated shift in direction first shows its hand, the micro-trigger that dates a macro-change. The register is always the decade's — the broad matters of trajectory and phase — sounded briefly at the scale of a single day, light in the calm stretches and pointed at the turns.