Documentation
When the birth time is unknown
What you can and cannot work out without a time, and how to say so honestly.
Many people do not know their birth time. Here is what still holds, and what does not.
What changes
- The Ascendant and houses change sign about every two hours. Without a time they are not known.
- The Moon moves about 13 degrees a day, so its nakshatra can change during the day, and its sign about every two and a half days. Check both ends of the day.
- Slow planets barely change in a day. Sun, Mercury, Venus and Mars signs are usually safe, except on the day one changes sign.
- Vimshottari dates come from the Moon's exact degree, so they can shift by months or more.
What to do
- Ask for what they do remember. A morning or an evening narrows it a lot.
- Calculate at both ends of the day, at 00:00 and at 23:59. Whatever matches in both answers is safe to show.
- Show only what is safe. Sign horoscopes, numerology, Chinese zodiac and Moon-sign readings work without a time when the Moon stays in one sign.
- For a Moon-sign answer,
sign-daily-areasneeds only the sign, andnumerology-matchneeds only dates of birth. - To estimate the time,
kp-btrdoes birth time rectification from events in the person's life.
What not to do
Do not silently use 12:00 noon and show houses as if they were known. Say that the time is unknown, and leave the houses out.