This page applies this app's business-launch muhurat rules to one month, December 2026. The Muhurat calculator and the Muhurat feature run an engine that scores three 90-minute windows a day, at 06:40, 09:15 and 15:30 IST, so December has 93. Of those, 37 have the Moon in a nakshatra the engine lists for a business launch, 21 overlap Rahu Kaal, and 2 pass every general rule.
Business launch windows in December 2026 that pass every general rule
| Date | Window (IST) | Moon nakshatra | Tithi, paksha |
|---|---|---|---|
| Monday 14 December 2026 | 9:15 AM to 10:45 AM | Dhanishta | 5, Shukla |
| Monday 14 December 2026 | 3:30 PM to 5:00 PM | Dhanishta | 5, Shukla |
No other window passes every rule; another 29 miss by exactly one factor:
| The one factor that fails | Windows in December 2026 (IST) |
|---|---|
| Nakshatra not on the list: 15 | 9 Dec, all three; 10 Dec, all three; 11 Dec, 6:40 AM and 3:30 PM; 16 Dec, all three; 21 Dec, 9:15 AM and 3:30 PM; 23 Dec, 3:30 PM; 24 Dec, 6:40 AM |
| Dark half (Krishna paksha): 7 | 3 Dec, all three; 4 Dec, 6:40 AM and 3:30 PM; 30 Dec, 6:40 AM and 9:15 AM |
| Weekday not on the list: 5 | 12 Dec, 6:40 AM (Saturday); 15 Dec, 6:40 AM and 9:15 AM (Tuesday); 20 Dec, 6:40 AM and 9:15 AM (Sunday) |
| Tithi on the avoided list: 1 | 23 Dec, 6:40 AM (Shukla 14) |
| Overlaps Rahu Kaal: 1 | 14 Dec, 6:40 AM |
How the days are chosen: the five general factors
A window "passes every rule" when all five are favourable: the Moon's nakshatra, tithi and paksha at the window's start, Rahu Kaal and the weekday. That counts factors on the engine's lists; it is neither the engine's score nor a ruling from any text.
| Rule | On the list for a business launch in this engine | Where it comes from |
|---|---|---|
| Moon nakshatra | Ashwini, Rohini, Pushya, Uttara Phalguni, Hasta, Chitra, Anuradha, Uttara Ashadha, Shravana or Dhanishta | The engine's list; no text in the library holds it. |
| Tithi | Not the 4th, 8th, 9th or 14th tithi of either half (the engine counts 1 to 30: 4, 8, 9, 14 in the bright half, 19, 23, 24, 29 in the dark half) | The engine's list. Its comment calls 4, 9, 14 (and 19, 24, 29) Rikta and 8 and 23 Ashtami, and says no source book lists tithis to avoid. BPHS Ch. 89 Sl. 1-7, written for a different rite, asks for a day without Rikta-Bhadra Dosha but does not say which tithis are Rikta. |
| Paksha | Shukla, the waxing Moon | BPHS Ch. 3 Sl. 11 and Saravali Ch. 4 Sl. 9 call the waning Moon a malefic; Saravali Ch. 4 Sl. 36 has benefics strong in the bright half. Reading that as good for a beginning is the engine's step. |
| Weekday | Monday, Wednesday, Thursday or Friday | The engine's list; no citation. |
| Rahu Kaal | The window does not overlap it | The engine's weekday table, after Drik Panchang as its comment records. No text in the library mentions Rahu Kaal. |
Two personal factors, the Moon's house from your ascendant (or Moon sign) and your Personal Day number, are added only in the calculator and the in-app feature; the engine's business-launch house list (1, 2, 3, 10, 11) cites no book either.
What the texts say about starting a business, and the junction check
A search of BPHS, Saravali, Daivajna Vallabha, the Bhrigu Sutras and Advanced Predictive Astrology found no muhurat rule, and no list of nakshatras, tithis or weekdays, for starting a business. Saravali Ch. 7 Sl. 5-6 comes nearest and works chart by chart: an enterprise of a bhava does better on the weekday, hora, month or year of that bhava's lord. BPHS Ch. 11 says what houses signify, not when to act: wealth under the 2nd (Sl. 3), trade under the 7th (Sl. 8), profession and livelihood under the 10th (Sl. 11), income and prosperity under the 11th (Sl. 12). The engine's launch list has the 2nd, 10th and 11th but leaves the 7th out; the match is this page's observation, not a source the engine cites.
The other text is gandanta. BPHS Ch. 92 Sl. 1 reads birth, travel and auspicious functions such as marriage at a junction of tithis, nakshatras or lagnas as inauspicious; this site does not repeat the outcome it names. A launch is not among its examples, so the check below is a fact about the windows, not a rule for one. Sl. 2 puts the tithi junctions at the last two ghatikas of tithis 5, 10 and 15 and the first two of tithis 1, 6 and 11; this page reads those numbers within each half of the month (20, 25, 30 and 16, 21, 26 in the engine's 1-30 count). Sl. 3 puts the nakshatra junctions between Revati and Ashwini, Ashlesha and Magha, Jyeshtha and Mula. A ghati is 24 minutes (Ch. 5 Sl. 6-8), so two is 48. The engine tests none of this, though Ashwini is on its launch list.
On the engine's change times, both passing windows keep one nakshatra and one tithi throughout and overlap no 48-minute span; only 4 of the 93 windows do, two of them listed near misses (9 and 24 December, 6:40 AM). The 3:30 PM window ends at 5:00 PM and the last 48 minutes of Shukla 5 run from 6:30 to 7:18 PM, 90 minutes later. The Moon crosses the Jyeshtha-Mula junction at 21:02 IST on 9 December, and Sl. 5 names a wider span at this junction, Abhukta Mula (the last six ghatikas of Jyeshtha and the first eight of Mula); it runs from about 18:38 IST on 9 December to 00:14 on 10 December. No listed window falls inside it. The 9:15 AM window opens two minutes after the Moon passes from Shravana into Dhanishta (09:13 IST); both are on the launch list, so the nakshatra rule holds either way.
Worked example: the same month ranked for one reference chart
With the two personal factors added, the engine ranks the month for a fixed reference chart (1985-01-01 06:00 IST, New Delhi, 28.6139 N, 77.2090 E). These five are that chart's alone; the engine calls each Excellent.
| Score | Window (IST) | The engine's reasons, shortened | General rule missed |
|---|---|---|---|
| 81 | Saturday 12 December, 6:40 AM | Uttara Ashadha; Moon in 2nd house; Shukla; Personal Day 9 | Weekday |
| 79 | Monday 14 December, 3:30 PM | Dhanishta; Moon in 3rd house; Shukla | None |
| 79 | Monday 14 December, 9:15 AM | Same as the row above | None |
| 79 | Thursday 3 December, 9:15 AM | Uttara Phalguni; Moon in 11th house; Personal Day 9 | Dark half |
| 79 | Thursday 3 December, 6:40 AM | Same as the row above | Dark half |
Both windows that pass every rule reach the top five, but this chart's leader misses the weekday rule. The 2nd and the 3rd house are both on the launch list, so the house does not separate the Saturday window from the 14 December pair; its Personal Day 9 line, which they lack, outweighs the weekday bonus they earn.
Limits: what these windows cannot tell you
- They are not a verdict on any venture: a launch involves a market, money, people and paperwork, and the filter tests none of them.
- Three windows a day is a sample: 13 of December's 93 change nakshatra or tithi inside their 90 minutes. Times are IST and Rahu Kaal sits on a fixed 06:00 to 18:00 grid, so a sunrise-based panchang can differ; the panchang, Choghadiya and Rahu Kaal calculators cover the whole day or a place.
- No window, whether it passes every rule or not, is a promise about a business. The Muhurat calculator takes your birth date, time, place and one activity and returns the top three windows of the 30 days from the day you use it. See also November 2026 and January 2027.
- Why do the 14 December windows pass when the 15 December morning windows, also in Dhanishta, do not?
- Tuesday is not on the engine's weekday list for a launch. The 6:40 AM and 9:15 AM windows on 15 December miss only that rule; by 3:30 PM the Moon has moved on to Shatabhisha and the window misses more.
- Why is 6:40 AM on 14 December not on the list when the other two windows that day are?
- Monday's Rahu Kaal on the engine's grid is 7:30 to 9:00 AM. The 6:40 AM window overlaps it; the 9:15 AM window starts 15 minutes after it ends.
- Does a window that passes every rule guarantee a business will do well?
- No. It means five factors are on the favourable side of this app's lists; this app does not forecast how a business will go.
- Should I use the day I register the business or the day I open it?
- No text cited here says which counts, and the calculator does not ask: it ranks sampled windows over the 30 days from the day you use it.
Muhurat Finder
Ninety windows over thirty days, scored against your chart. The best three come back.
What it needs
Date, time and place + What the muhurat is for
That is more than this article asks for - it only ever takes a date, and sometimes a time, and never a name or a birth place. So this one runs on its own page, which asks for exactly what it needs and stores none of it.
Run it on its own page