Is this not overthinking a date?

Probably, if you use it to overrule a day that suits you both. It is more useful the other way round — when several evenings are equally possible and you have no reason to prefer one.

Should I use their birth details or mine?

Yours. You are choosing when to suggest it, and in any case asking someone for their exact birth time before a first date is its own kind of mistake.

Does the place matter?

Only if it is in a different time zone from where you were born, in which case setting it changes which local hours are scored and shifts the planetary hours with local sunrise.

Is checking a day free?

Yes — any single day, in full, as often as you like, with no account. A pass adds the ability to scan a range and have every day in it ranked.

Best day for

The best day for a first date

A first date wants ease rather than permanence. This ranks the evenings ahead against your own chart, names the best hour of each, and is honest about the ones that are likely to feel like hard work.

Check a day, free

Attraction and ease, not commitment

The scoring here is deliberately lighter than for a wedding or a proposal. Venus leads for attraction, Mars is given real weight for the spark, and the Moon matters for how the evening feels. What is almost absent is Saturn as a positive — endurance is not the point of a first date, and a day built for permanence is not necessarily a fun one.

Your Ascendant is weighted highly, more than for most occasions. It is the part of the chart traditionally tied to how you come across before anyone knows you, which is precisely the question on a first date.

The evening, specifically

Six hours of each day are scored between 09:00 and 19:00, and the best is reported with the day. For a first date the hour is usually yours to choose, and the difference between early and late on the same day is often larger than between two different days.

The planetary hours are measured from local sunrise rather than the clock, so they move through the year — which is why the same time on the same weekday scores differently in November and June.

Lower stakes, so use it lightly

This is the occasion where it is worth saying that the tool should not be taken too seriously. A first date that goes badly costs an evening. If the ranking says Thursday and you are free on Wednesday, go on Wednesday.

Where it earns its place is the opposite case: when you have a free week and no reason to prefer any evening in it, this gives you one.

What the scoring weighs for first date

Attraction and ease rather than permanence. Venus, Mars and the Moon; Saturn is the mood-killer to avoid.

Planets that matter most

♀ Venus×1.6
☽ Moon×1.2
♂ Mars×1
☿ Mercury×0.9
♃ Jupiter×0.9

Points in your chart

♀ Venus×1.6
☽ Moon×1.2
AC Ascendant×1.2
♂ Mars×1

A favoured day or planetary hour ruled by ♀ Venus, ☽ Moon, ♃ Jupiter adds a little more. The numbers are multipliers on each aspect found, not a score out of ten — they decide what counts, not what the answer is.

What it warns you about

Venus retrograde
Penalised, though more lightly than for a proposal or a wedding — the tradition’s objection is to commitment made under it, and a first date is not a commitment.
Hard Saturn contacts
Saturn is the mood-killer here: the evening that feels like an interview, heavy going and formal. More of a concern for a first date than almost anywhere else.
A void-of-course Moon
Counted, but lightly — less than half the weight it carries for a wedding. A void Moon is barren for things meant to lead somewhere, and a first date is allowed to be just an evening.

Check a day for first date

One day at a time is free and holds nothing back. Your birth details are used to calculate your chart and are never stored. A pass searches a range and ranks every day in it.

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What are you planning?

Attraction and ease rather than permanence. Venus, Mars and the Moon; Saturn is the mood-killer to avoid.

About you

Used to build your birth chart. Calculated, returned, and never stored.

Date of birth

Time of birth

Local clock time where you were born. If unknown, 12:00 is the usual stand-in — the Moon and the angles lose precision.

Place of birth

Needed for your Ascendant and Midheaven.

When might it happen?

Which day are you considering?

Where will it happen? (optional)

Only worth setting if the event is in a different time zone from your birth place — it decides which local hours are scored, and the planetary hours from local sunrise.

Checking one day is free, in full — every aspect, the best hour, any warnings. A pass searches up to a full year and ranks every day.

Questions

Is this not overthinking a date?: Probably, if you use it to overrule a day that suits you both. It is more useful the other way round — when several evenings are equally possible and you have no reason to prefer one.
Should I use their birth details or mine?: Yours. You are choosing when to suggest it, and in any case asking someone for their exact birth time before a first date is its own kind of mistake.
Does the place matter?: Only if it is in a different time zone from where you were born, in which case setting it changes which local hours are scored and shifts the planetary hours with local sunrise.
Is checking a day free?: Yes — any single day, in full, as often as you like, with no account. A pass adds the ability to scan a range and have every day in it ranked.