Choosing a launch date in this tradition means scoring six things at once: the number of the day itself, the total of the full date, the weekday and its ruling planet, your personal year, your personal month, and how all of that sits against the founder's own numbers and the business name. No single one of those decides it. A date that is excellent on the day number and adverse on the weekday is an ordinary date, not a good one.
What follows is the whole method, with the weights each part carries, and one real month ranked from start to finish so you can check every sum.
Choosing a launch date starts from a window you can meet
Before any arithmetic: pick the month you can realistically launch in. A perfect date you cannot meet is worth less than a good date you can. The tradition is unambiguous that a launch which happens late because the founder was waiting for a number is worse than one that happens on a merely acceptable day.
In practice this means the method is a ranking tool inside a fixed window, not a search across the calendar. Give it a month, or a fortnight, and let it order what is already available to you. That is how the launch date finder is built — it scores every date in a range you set rather than hunting for the theoretical best day of the decade.
The two numbers a date carries
Every date carries two numbers, and they are not the same thing.
The date number is the day of the month, reduced to a single digit. The 23rd is 2 + 3 = 5. The 14th is 1 + 4 = 5. The month and the year never enter it.
The full-date total is every digit of the written date, added and reduced. For 5 June 2026: 5 + 6 + 2 + 0 + 2 + 6 = 21, and 2 + 1 = 3. The tradition writes this as 21/3 — the compound first, the reduced digit second — because the total a number arrived at from carries meaning the bare digit loses.
Of the two, the date number does most of the work. It carries roughly a third of the final score on its own. The full-date total is used more narrowly: in the 4-and-4 block described below, and for media and content launches, where the tradition favours totals in the 3-6-9 set.
Step one: the universal tiers
Before your own numbers enter it, the tradition sorts date numbers into tiers that apply to everybody.
| Tier | Date numbers | How the method reads them |
|---|---|---|
| First tier | 1, 5, 6 | Named as the three most important dates for beginning anything |
| Second tier | 3, 9 | Positive, but secondary |
| Weak | 7 | Workable, rarely recommended on its own |
| Avoid | 2, 4, 8 | The universal caution set |
Two things are worth saying plainly about that bottom row. First, 5 and 6 are treated as favourable for everyone except founders carrying a 3 — one of the few places the tradition makes an exception to its own universal list. Second, the avoid set is not a prohibition for everyone. It is a default that your own numbers can override, and in strict mode it becomes a hard refusal. Whether 4 deserves its place there at all is contested; that argument is set out in is 4 unlucky for business.
Step two: the hard blocks
Some dates are refused outright, regardless of how well they score elsewhere. There are three refusals.
- The date number is adverse to your birth number. Your birth number is the day of your own birth, reduced — the Mulank, or driver. If the compatibility table reads the candidate date as adverse to it, the date is blocked.
- The date number is adverse to your destiny number. The destiny number is your whole birth date reduced — the Bhagyank, or conductor. Same test, second axis. Both of these are worked out for you by the core numbers calculator.
- Both the date number and the full-date total fall on 4. The tradition singles this pattern out as the most difficult of all for an establishment date, and refuses it on its own.
A blocked date is not merely a low-scoring date. In a ranked list it is capped near the bottom and shown with the reason attached, so you can see which of the three fired.
There is a case worth flagging here because it surprises people. Four and eight are read as adverse to themselves. A founder whose birth number is 4 does not get a good date on the 4th, 13th, 22nd or 31st — those are their own-number days, but the same number read against itself is a refusal, so the block fires. For every other number the own-number day is a strong date. For 4 and 8 it is not.
Step three: the weekday and its planet
Each weekday carries a planetary number, and the site's scorer weighs it at roughly a sixth of the total — a tuned weight, not one the tradition states.
| Weekday | Planet | Number |
|---|---|---|
| Sunday | Sun | 1 |
| Monday | Moon | 2 |
| Tuesday | Mars | 9 |
| Wednesday | Mercury | 5 |
| Thursday | Jupiter | 3 |
| Friday | Venus | 6 |
| Saturday | Saturn | 8 |
Note what is missing: no weekday carries 4 or 7. There is no day of the week ruled by Rahu or Ketu. This means founders whose numbers are friendly to 4 or 7 can never gain weekday support from that friendship — the best they can do is avoid a hostile weekday.
The weekday is scored three ways. If its number equals your birth number, it scores highest short of the coincidence bonus, and the reading notes that the day is ruled by the planet of your own number. If it is merely friendly, it takes a little over half of that. If it is adverse, it scores negative — as the personal year and the personal month can too. And where the date number and the weekday number both match your birth number, a bonus is added on top for the coincidence.
That negative is the part people underestimate. An adverse weekday can pull an otherwise first-tier date down below a second-tier date on a neutral weekday.
Step four: the personal year and month
The personal year is your birth day and month added to the year in question, reduced. It moves the score more than anything except the date number itself.
| Personal year | How the method scores it |
|---|---|
| 1, 5, 6 | Strongest — the years the tradition marks for beginnings |
| 8 | Strong but heavy; slow, accumulating, property-shaped |
| 3 | Good |
| 2 | Modest |
| 9 | Weak — a closing year, not an opening one |
| 7 | Slightly negative |
| 4 | Strongly negative — the hardest year to start in |
On top of that, the relationship between your personal year and your birth number adds or subtracts again. A personal year that is friendly to your own number is worth materially more than the same year number would be to a different founder. The year-by-year reading is set out in full in the personal year number for business, and four years of it at once are laid out on the timing dashboard.
The personal month is lighter — under a tenth of the score. It is the personal year plus the calendar month, reduced. There is one extra screen worth knowing: where the month, the universal year and your birth number are mutually adverse — all three hostile to each other — the method advises against large commitments in that month regardless of what the individual dates look like.
Step five: name resonance
The last component ties the date back to the business itself. It fires in three places: when the date number matches the business name number, when the launch year reduces to the business name number, and, for media and content businesses only, when the full-date total lands in the 3-6-9 set. A date number in the 1-3-5-6 launch set adds a little more.
You need a settled name number for any of this, which the business name analyzer will give you. Where no name exists yet, the component is dropped and its weight is spread across the others rather than counted as a zero — a missing input should not read as a bad input.
A month ranked end to end
Take a founder born 22 September 1986, launching in June 2026, with a business name totalling 3.
Their birth number is the 22nd reduced: 2 + 2 = 4, written 22/4. Their destiny number is the whole date: 2 + 2 + 0 + 9 + 1 + 9 + 8 + 6 = 37, and 3 + 7 = 10, and 1 + 0 = 1, written 37/1. Their personal year for 2026 is 2 + 2 + 0 + 9 + 2 + 0 + 2 + 6 = 23, and 2 + 3 = 5 — one of the three strongest.
With a birth number of 4, the compatibility table blocks date numbers 2, 4, 8 and 9. That removes every 2nd, 4th, 8th, 9th, 11th, 13th, 17th, 18th, 20th, 22nd, 26th, 27th, 29th and 31st at a stroke. What survives are date numbers 1, 3, 5, 6 and 7.
The top of the ranking comes out as:
| Date | Weekday | Date no. | Full total | Score |
|---|---|---|---|---|
| Fri 5 June | Venus | 5 | 21/3 | 76 |
| Wed 10 June | Mercury | 1 | 17/8 | 76 |
| Sun 14 June | Sun | 5 | 21/3 | 76 |
| Fri 19 June | Venus | 1 | 26/8 | 76 |
| Wed 24 June | Mercury | 6 | 22/4 | 76 |
| Sun 28 June | Sun | 1 | 26/8 | 76 |
Take Friday 5 June and open it up. Date number 5 is friendly to birth number 4, which takes 26 of a possible 30 on that component — 87 out of 100. Friday is Venus, number 6, also friendly to 4, taking 12 on a scale running from −15 to 30 — 60. The personal year of 5 takes the maximum, and the friendly relationship between 5 and 4 adds the bonus, so that component maxes at 100. The personal month lands neutral at 67. Name resonance takes 10 of 25 for a date number in the launch set, but the name number 3 matches neither the date nor the year, so it stops at 40.
Weighted at 28, 16, 22, 8 and 14 respectively — the yearly-window component is dropped, because the sources give a stated window only for numbers 7 and 8, and favourable months only for 2, and this founder is none of those:
(87 × 28) + (60 × 16) + (100 × 22) + (67 × 8) + (40 × 14)
= 2436 + 960 + 2200 + 536 + 560
= 6692
6692 ÷ 88 = 76Now contrast Saturday 13 June, which looks tempting because the 13th reduces to 4 — the founder's own number. It scores 25 and is blocked. Date number 4 is adverse to birth number 4, so the refusal fires; and Saturday is Saturn, number 8, also adverse to 4, so the weekday component goes negative. Two of the strongest signals in the method both point the wrong way on a date that a founder reading a summary table would have picked out as theirs.
Monday 8 June is blocked twice over: date number 8 is adverse to the birth number 4 and to the destiny number 1, and Monday's Moon is adverse as well.
Choosing a launch date versus a registration date
These are usually three different dates, and the tradition weighs them differently.
The registration date is the one that goes on the certificate and never changes. It is the date the method treats as the company's own birth date, and it is what feeds the company's personal year later. If you can control only one date, most sources say control this one. The specific rules for it are set out in the best date to register a company.
The launch date is the day trading starts — the shop opens, the site goes live, the first invoice is raised. Where registration and trading are far apart, some practitioners read the trading date as the real one on the grounds that it is the date the business actually begins to act.
The first sale is not scored by this method at all, though you will find people who claim it is.
Where you genuinely control only one, control the one that marks the start of trading, and treat the other as fixed input rather than a decision.
Where this runs out
The method has real limits, and they are worth stating.
It cannot tell you whether the business is a good idea. Nothing in the arithmetic touches the market, the product, the funding or the founder's competence, and a well-timed launch of a bad business is still a bad business. Timing is the smallest of the variables in front of you.
The sources disagree on when a personal year turns — the birthday, 1 January, or the spring equinox, depending on which account you follow. That disagreement can move a founder's personal year by a full digit for several months, which is enough to reorder a ranking. The site applies one rule consistently rather than averaging them, and says which; the reasoning is set out on the methodology page.
The yearly-window component exists for only three numbers — windows for 7 and 8, favourable months for 2 — because those are the only ones the site's timing rules carry. Silence has been treated as silence rather than filled in by inference. That is a deliberate choice, and it means the model is thinner for some founders than others.
And the ranking is a ranking, not a verdict. Six dates tied at 76 in the example above are not distinguishable by this method. Pick whichever of them suits the business, and treat the arithmetic as one input among many rather than an instruction.
Frequently asked questions
What is the best date to start a business?
There is no single best date. The tradition's universal first tier is date numbers 1, 5 and 6 — the 1st, 5th, 6th, 10th, 14th, 15th, 19th, 23rd, 24th and 28th of any month. But those are only a starting filter. Which of them is right for you depends on your birth number, your destiny number, the weekday and your personal year, and a first-tier date can still be blocked outright by your own numbers.
Does the launch date matter more than the registration date?
The sources split. The registration date is permanent and becomes the company's own birth date for later readings, which argues for weighting it more. The trading date is when the business actually begins to act, which argues the other way. Where you control both, align them. Where you control one, control the one that marks the start of trading.
Should I avoid the 4th, 8th, 13th and 22nd?
Not automatically. The 2-4-8 caution set is a default, not a rule, and your own numbers can override it — a founder whose birth number is friendly to 8 is not barred from the 8th. What is refused outright is a date adverse to your birth or destiny number, and any date where both the day number and the full-date total fall on 4.
Can a good weekday rescue a bad date number?
No. The date number carries nearly twice the weight of the weekday, and the refusals against your birth and destiny numbers are decided on the date number alone. A hostile weekday can pull a good date down, but a friendly weekday cannot lift a blocked one.
What if my birth number is 4 or 8?
Then your own-number days are not your good days, because 4 and 8 are read as adverse to themselves. This is the one case where the usual advice to favour your own number reverses. You are also short of weekday support, since no weekday carries 4. Work from the friendly numbers in your row of the compatibility table instead.
How far ahead should I plan?
Far enough to have a real choice inside the window, and no further. A fortnight usually contains at least one workable date; a month almost always does. Ranking a year ahead produces a longer list without producing a better answer, because the personal-year component only changes once a year.