The Moon without a birth time
Without a birth time, ChartLiving estimates the Moon at local noon in the birth place's time zone. The Moon moves about 13° a day and can change signs in a few hours, so a sign that sits near a cusp at noon may be the neighboring sign at the real minute. That noon Moon is not a rising sign.
The rest of this page is the difference between those two facts: a fast planet placed at a stand-in clock, and a horizon the product refuses to invent.
What the stand-in clock is
The natal chart calculator still needs a civil time to run the ephemeris. When you check I don't know my birth time, the clock it uses is 12:00:00 in the birth place's time zone. Springfield, Illinois, means noon in that city's zone, not noon in UTC and not noon in a different Springfield that only shares the name.
Noon is a computational stand-in. It is not a claim that the birth happened at lunch. On a date-only chart the Moon is marked Local-noon estimate, so the stand-in stays visible next to the sign. Planet signs and aspects are still calculated. Houses, the Ascendant, and the Midheaven stay off the page. The wider split — what a date-only chart can and cannot carry — is Birth chart without birth time.
Why the Moon is the planet that moves
Thirteen degrees a day is a lot next to the Sun. A zodiac sign is 30° wide. The Sun takes about a month to cross one sign. The Moon can cover that same 30° in a little over two days, which is where "about 13° a day" comes from. Near the end of a sign, the degrees still left are small enough that a few hours finish the crossing.
The speed is the reason the boundary matters, not a reason to throw out every noon Moon. Picture a Moon that the noon calculation places at 28° of a sign. The Moon is moving about half a degree an hour. Four hours earlier and four hours later are not guaranteed to be the same slice. One side of noon can still be the sign on the page. The other side can already be the next sign. The reverse sits at the other edge: a Moon at 2° of a sign can still have been in the previous sign that morning. If the Moon sits in the middle of a sign at noon — around 15°, with the boundary many hours away — the sign is the stable part of the estimate.
ChartLiving does not search the calendar day for every minute and then hide a range. It shows one Moon, the one at local noon, and leaves the cusp caution in the reading. If you only know "sometime that day," treat a Moon within a few degrees of 0° or 29° as maybe-not-final. Treat a Moon in the middle of the sign as the sign for that calendar day.
The slower bodies do not need the same warning. Mercury, Venus, and Mars do move, and they can change signs, but they rarely do it between breakfast and dinner. Jupiter through Pluto will sit still for this purpose. The Sun changes signs on a known calendar day, not in a quiet hour. The Moon is the line that earns the extra sentence.
A noon Moon is not an Ascendant
The Ascendant is the zodiac degree on the eastern horizon at the birth minute. It moves about one degree every four minutes. That motion is why a recorded minute can aim the houses, and why a rounded "around noon" is not a rising sign either.
Local noon does not aim the horizon for an unknown morning or an unknown evening. ChartLiving does not pretend it does. There is no rising-sign row, no Midheaven row, and no house ring when the form uses the unknown-time check. The Moon sign on that page is a planet longitude at 12:00. It is not "Virgo rising because the Moon was in Virgo at lunch." Those are different points. One is a body. The other is the eastern horizon. Mixing them is how a date-only chart grows a horizon nobody recorded.
If a later record supplies a minute, two things happen, and they are not the same event. The Moon may stay in the noon sign, or it may move to the neighbor if the noon position was near a cusp. The Ascendant appears for the first time. It is not a correction of the noon Moon. It is a measurement the noon run left blank on purpose.
What to quote, and what to leave off
On a date-only chart, quote the noon Moon's sign together with the cusp caution above. Quote the Sun and the other planet signs for that date and place. Quote major aspects among those bodies when they fall inside the orbs this site uses. Leave the Moon's house off, because the house column is blank. Leave the rising sign off, because it is not on the page.
Place still matters for the estimate. The same numbers on a wall clock are not the same instant in Springfield, Illinois, and Springfield, Massachusetts. A noon stand-in needs the town, or coordinates plus an IANA time zone, so the offset matches the place. A wrong town shifts the Moon by the size of that time-zone error. It still does not create an Ascendant.
A date with no minute
Maya's family has a Springfield, Illinois, record for March 14, 1991, and no clock time. The natal chart calculator can still run. It will use local noon, mark the Moon as a local-noon estimate, and keep houses and rising hidden. The Sun that day sits in Pisces. That solar sign is a calendar fact. The Moon sign is the noon fact, and it stays provisional when it is close to a sign boundary. Nothing on that page is a rising sign, including the Moon.
If someone later finds "6:42 a.m." or any other minute, run the chart again. Compare the new Moon sign with the noon sign before repeating the old one. Read the Ascendant only from the timed chart. The date-only page never had it.
Until a minute exists, the honest sentence stays short. The Moon is a local-noon estimate. Near a cusp it may be the neighboring sign. It is not a rising sign.