出生时间、子时换日与农历闰月

时辰

一天分为十二个时辰，每个约两小时：子时 23:00–00:59、丑时 01:00–02:59……亥时 21:00–22:59。紫微斗数的命宫、身宫和许多星的位置都取决于时辰。

不知道时辰

相差一个时辰，命宫就会移到另一宫，整张盘随之不同。因此应用在时辰未知时不排命盘、不给个人分数，只显示对所有人相同的通用黄历，并提示可以补全时间。它不会替你猜一个时辰。

早子时与晚子时

子时跨越午夜。00:00–00:59 称早子时，属于当天；23:00–23:59 称晚子时。晚子时归属有两种说法：

算作次日（应用默认）：晚子时按第二天排盘，日柱换为次日。
算作当日：仍按当天日期，只把时辰记为子时。

应用会显示实际用于排盘的日期与时辰，说明是否因晚子时换日。

农历闰月

农历大约每两到三年插入一个闰月，例如 2023 年有闰二月。出生在闰月时，填写农历日期并勾选“闰月”；应用会检查该年是否确有此闰月。闰月归属有两种处理：

月中分界（应用默认）：闰月十五日及以前算本月，十六日起算下月。
整月算本月：整个闰月都按它所闰的月份。

年界

排盘中的“年”从哪天开始也有两说：农历正月初一（应用默认），或节气立春。出生在两者之间的人，两种口径的生年天干不同，四化也会不同。

这些都是流派口径的选择，应用在档案的“排盘设置”中标明当前使用的口径。

Birth time, the zi hour and leap months

A day has twelve double-hours (子 23:00–00:59, 丑 01:00–02:59, … 亥 21:00–22:59). The life palace, body palace and many stars depend on the hour.

Unknown time. One hour off moves the life palace and changes the whole chart, so with an unknown time the app shows no chart and no personal score, only the general almanac. It never guesses an hour.

Early and late zi. 00:00–00:59 is early zi, on the same day. 23:00–23:59 is late zi: by default the app counts it as the next day; the alternative keeps the same date. The app shows which date and hour were used.

Leap months. Enter the lunar date and tick “Leap month”; the app checks that the year has it. By default days 1–15 count as the base month and day 16 onward as the next month; the alternative counts the whole leap month as the base month.

Year boundary. The chart year starts at Lunar New Year by default, or at the Start of Spring solar term (立春). For births between the two, the year stem and its transformations differ.

These are choices of school; each profile's calculation settings show which ones are in use.