阳历、农历与闰月排盘
日期输入是排盘最常见的错误来源之一。阳历通常指公历日期，农历是传统阴阳合历日期。两者的年月日数字不能直接互换。例如“八月十五”如果来自农历记录，就必须选择农历，而不是把相同数字填入公历。
先确认原始记录
最可靠的信息通常来自出生证明、医院记录或当时的家庭记录。询问长辈时，应确认所说日期属于公历还是农历，也要确认时间是当地时间、上午或下午，以及是否接近午夜。不要只依靠多年后的模糊记忆。
闰月为什么重要
农历为了协调月份与回归年，会在某些年份设置闰月。闰月与同名普通月份并不是同一个月。若出生记录写明“闰四月”，排盘时必须勾选闰月；遗漏这个信息可能导致换算后的公历日期和命盘结构不同。
午夜与时辰边界
接近 23:00、00:00 或传统时辰边界的出生时间，可能因日期换日规则和流派差异产生不同结果。建议保留原始分钟，并记录采用的换日规则。若只知道大概时辰，应明确不确定性，而不是假装分钟精确。
常见检查清单
- 确认公历或农历；
- 农历是否为闰月；
- 确认上午、下午和分钟；
- 确认出生地当时使用的时区；
- 记录是否采用真太阳时；
- 遇到边界时间时比较两种规则的差异。
Solar, Lunar, and Leap-Month Dates
Date input is one of the most common sources of chart errors. Solar normally refers to the Gregorian calendar, while the lunar calendar is the traditional lunisolar calendar. Their year, month, and day numbers cannot be used interchangeably. If “the fifteenth day of the eighth month” came from a lunar record, the lunar option must be selected rather than entering the same numbers as a Gregorian date.
Confirm the original record
The most reliable information usually comes from a birth certificate, hospital record, or a record made by the family at the time. When asking relatives, confirm whether the date is Gregorian or lunar, whether the time is AM or PM, and whether it was close to midnight. Avoid relying only on a vague memory many years later.
Why leap months matter
The lunar calendar inserts a leap month in some years to coordinate months with the solar year. A leap month is not the same month as the regular month with the same name. If the record says “leap fourth month,” the leap-month option must be selected. Omitting it may change the converted Gregorian date and chart structure.
Midnight and time boundaries
Births near 23:00, 00:00, or a traditional two-hour boundary may produce different results under different day-change rules or schools. Keep the original minutes and document which rule is used. If only an approximate time is known, acknowledge the uncertainty instead of presenting false precision.
Input checklist
- Confirm Gregorian or lunar calendar.
- Check whether a lunar date is in a leap month.
- Confirm AM, PM, and minutes.
- Confirm the time zone used at the birthplace and date.
- Record whether true solar time is applied.
- Compare methods when the time is close to a boundary.