Celebrity charts are only useful when the birth data is read with the right level of confidence. A date can be solid while the exact hour is weak, approximate, disputed, or missing. Arcadia separates those cases so the chart does not pretend that houses, the Rising sign, and angular dominants are equally reliable for every public figure.
The simple rule is this: signs and most planetary aspects can still be useful without a birth time, but houses, Rising sign, Midheaven, IC, Descendant, and angular dominants need a reliable hour. The Moon is the middle case. It is often usable, but if the birth time is unknown and the Moon is near a sign change or an aspect has a wide orb, read it cautiously.
Without a reliable hour, the strongest reading base is the Sun sign, personal planets, slow planet placements, and tight non-time-sensitive aspects. These still show planetary functions: identity, emotion, thought, desire, action, growth, limits, rupture, imagination, and pressure.
What should be removed from the main proof is just as important. The Rising sign can change quickly. The houses can rotate completely. Angular dominants depend on those axes. For celebrity examples, that means Arcadia should not say "public career house," "relationship house," or "Rising sign dominant" unless the time is available and the data quality is acceptable.
If a celebrity has a known date but no hour, the Sun in Leo, Mercury in Virgo, Venus in Cancer, and a tight Mars-Pluto trine can still be read. What should not be used as the main anchor is "Mars in House 10" or "Pluto near the Rising sign," because those depend on the missing hour.
If the same celebrity has an AA or A-rated time, the reading can add houses and axes. Then House 10 may describe public role, House 1 first impression, House 7 partners and audience, and House 4 roots or private foundations. Even then, the house claim should be checked against signs, aspects, and repeated themes.