Does this work for a product launch or a website going live?

Yes — anything you are starting and want to grow. The reading is about the act of beginning, not about what kind of business it is.

Whose chart should I use if there are several founders?

It reads one chart at a time. Use the person whose name the venture rests on, or check the same days for each founder and look for the ones that are good for all of you.

What about signing the lease or the investment agreement?

That is a different question — terms you will be held to — and it has its own occasion, “Negotiation or signing”, which weights Mercury even more heavily.

Will a good day make the business succeed?

No, and nothing here claims it will. It tells you when tradition considers the timing favourable; whether the business works depends on everything else.

Best day for

The best day to start a business

Registering the company, opening the doors, going live — if you can choose the day, this ranks the days ahead against your own chart, names the strongest hour, and says plainly when a stretch is a poor time to begin.

Last updated 11 October 2026

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The oldest question in the subject

Choosing a moment to begin something is what electional astrology was for long before anyone asked it about interviews. The idea is that a venture carries the sky of its first day, so you start it when that sky favours growth — and it is the reason this occasion is scored for expansion rather than for harmony or for being heard.

Jupiter, the traditional planet of growth and good fortune, carries the most weight here, with Mercury close behind for trade, contracts and customers. Among the points of your own chart, the Midheaven matters most: it stands for your public standing and what you are putting your name to.

Begin while the Moon grows

Tradition is emphatic that something meant to grow should begin while the Moon is filling, and the scoring follows it — the preference for a waxing Moon is stronger here than for anything except a wedding. A waning Moon is flagged on the day itself as better for closing things than opening them.

A void-of-course Moon is penalised firmly. It is the period after the Moon has made its last aspect before changing sign, and ventures begun under it are classically held to come to nothing.

Which day counts as the start

A business has several beginnings: the registration, the first trading day, the public launch. Use the one you actually have a choice over and that marks the start for you — for most people that is the opening or the launch, since registration dates are often set by paperwork.

The limit, stated plainly: this reads timing. It knows nothing about your market, your margins or your plan, and a well-timed launch of a weak idea is still a weak idea.

What the scoring weighs for starting a business

Something meant to grow, so Jupiter and a waxing Moon lead, with Mercury for trade. Mercury retrograde and a void Moon are the classic reasons not to open.

Planets that matter most

♃ Jupiter×1.5
☿ Mercury×1.3
☉ Sun×1.2
☽ Moon×1.1
♀ Venus×1

Points in your chart

MC Midheaven×1.5
☉ Sun×1.2
♃ Jupiter×1.2
☿ Mercury×1.1

A favoured day or planetary hour ruled by ♃ Jupiter, ☉ Sun, ☿ Mercury 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

Mercury retrograde
One of the two heaviest penalties for this occasion. Mercury rules commerce and agreements, and its retrograde weeks are traditionally the time to review and fix rather than to launch.
A void-of-course Moon
The other, penalised just as firmly. The classic warning against starting anything you want to come to something.
Mars retrograde
Penalised enough to be named on the day. Mars is the drive to push forward, and while it is retrograde momentum tends to stall.

Check a day for starting a business

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What are you planning?

Something meant to grow, so Jupiter and a waxing Moon lead, with Mercury for trade. Mercury retrograde and a void Moon are the classic reasons not to open.

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, ranks every day, and adds any day’s best hour to your calendar.

Questions

Does this work for a product launch or a website going live?: Yes — anything you are starting and want to grow. The reading is about the act of beginning, not about what kind of business it is.
Whose chart should I use if there are several founders?: It reads one chart at a time. Use the person whose name the venture rests on, or check the same days for each founder and look for the ones that are good for all of you.
What about signing the lease or the investment agreement?: That is a different question — terms you will be held to — and it has its own occasion, “Negotiation or signing”, which weights Mercury even more heavily.
Will a good day make the business succeed?: No, and nothing here claims it will. It tells you when tradition considers the timing favourable; whether the business works depends on everything else.