Do Daylight Saving and True Solar Time Affect the Chart? Check Longitude, DST and Leap Months

Clocks follow a uniform time zone, while the birth hour is set by local solar time at the birthplace, so longitude matters. Mainland China observed daylight saving from 1986 to 1991, so records from those years must first be shifted back one hour. Leap months, lunar phases and solar-term boundaries must not be mixed. For births near a boundary, comparing two charts is safest.

Set the hour by local solar time at the birthplace; shift 1986–1991 daylight-saving records back one hour; keep leap months, moon phases and solar terms separate.

What This Question Is Really Asking

Some set the hour directly from clock time; ignoring longitude, daylight saving and leap months can shift the whole chart.

The Underlying Logic

Check birthplace longitude and convert to local solar time.

For 1986–1991 births, shift daylight-saving records back one hour.

Keep leap months, lunar phases and solar-term boundaries separate.

Near a boundary, compare two charts.

A Step-by-Step Way to Read It

  1. Confirm the birth date
  2. Check birthplace longitude
  3. Undo daylight saving if needed
  4. Check leap month and lunar date
  5. Convert to the hour
  6. Compare charts near a boundary

Three Common Mistakes

Mistake 1: Use clock time directly

Mistake 2: Ignore daylight saving

Mistake 3: Mix moon phases and solar terms

Back to Your Own Chart

To set the hour, check birthplace longitude, 1986–1991 daylight saving and leap months before converting; near a boundary, compare two charts.

Reading Order

  1. Cast the natal chart first and locate the palaces and major stars tied to Daylight Saving and True Solar Time in Zi Wei Charts before judging anything
  2. Open the triple-direction of those palaces and count the auspicious, malefic and assistant stars separately
  3. Check where the natal Four Transformations land to set the chart's baseline tone
  4. Read the decade-limit transformations to see whether the Daylight Saving and True Solar Time in Zi Wei Charts line is activated in this stage
  5. Then read the annual transformations and the year's palace to pin down this year's trigger and timing
  6. Layer natal, decade and year before concluding, then decide how to act rather than labeling good or bad
Read this, then compare it against your own chart for clearer insight.Quick Chart →