Roughly every twenty-seven days the Moon reaches the eighth rashi from the one it occupied at your birth. Those two and a quarter days are your Chandrashtama, and tradition counsels against beginning anything of consequence during them. Because they depend only on your Moon sign, everyone sharing a rashi shares the same dates — so pick yours below.
This is not a warning about misfortune. Chandrashtama is read as a period of low resilience — the mind less steady, judgement less sure — so it is avoided for beginning things rather than treated as dangerous. Ordinary life continues entirely as normal. What it actually means →
Chandrashtama is counted from your Moon sign, not your Sun sign. Enter your birth details and we will tell you which it is — then take you to your dates.
Each page carries twelve months of dates with exact start and end times, and the eighth sign they are counted from.
Count eight signs forward from your birth Moon, inclusive. When the transiting Moon enters that sign, your Chandrashtama begins and runs until it leaves — about two and a quarter days.
| Your rashi | Chandrashtama when Moon is in | ||
|---|---|---|---|
| Mesha | Aries | Vrischika | Scorpio |
| Vrishabha | Taurus | Dhanu | Sagittarius |
| Mithuna | Gemini | Makara | Capricorn |
| Karka | Cancer | Kumbha | Aquarius |
| Simha | Leo | Meena | Pisces |
| Kanya | Virgo | Mesha | Aries |
| Tula | Libra | Vrishabha | Taurus |
| Vrischika | Scorpio | Mithuna | Gemini |
| Dhanu | Sagittarius | Karka | Cancer |
| Makara | Capricorn | Simha | Leo |
| Kumbha | Aquarius | Kanya | Virgo |
| Meena | Pisces | Tula | Libra |
Some traditions count from the nakshatra rather than the rashi. The rashi method above is the common one and gives a period of roughly two and a quarter days each lunar month. A stricter nakshatra reckoning marks the specific stars falling in that eighth sign, giving a narrower window. We calculate the rashi method and show the nakshatra transits within it.
The eighth in any chart governs sudden change, what is hidden, and what has been left unresolved. When the transiting Moon — which rules the mind — passes through the eighth from your birth Moon, that quality is read as touching your mental state rather than your circumstances.
The classical description is of reduced steadiness: judgement less sure, patience shorter, small setbacks felt more than they warrant. Nothing external is predicted.
Beginnings, and decisions that cannot easily be revisited. Signing an agreement, starting a journey, opening a business, making a significant purchase, fixing an alliance. Anything where clear judgement matters and the choice is hard to unwind.
What is not avoided: work already underway, meetings, travel already begun, medical treatment that cannot wait, and worship of any kind.
Rahu Kalam, choghadiya and tithi apply to everyone in a city at once. Chandrashtama does not — it depends on your own birth Moon, so your difficult days are someone else’s ordinary ones.
This is why it cannot be read from a printed panchang, and why it is worth knowing your own dates rather than consulting a general calendar.
When the Sun is also in your eighth rashi, the Chandrashtama falling in that month is read as heavier than usual. Some traditions add that a Chandrashtama falling on a Tuesday or Saturday is felt more.
These are refinements rather than separate rules, and none of them changes what is being advised: postpone beginnings, carry on otherwise.
Four systems, different scopes. Only one of them is yours alone.
| Period | Applies to | Lasts | Recurs | Avoided for |
|---|---|---|---|---|
| Chandrashtama | You alone | ~2¼ days | Every ~27 days | Beginnings and irreversible decisions |
| Rahu Kalam | Everyone in your city | ~1½ hours | Daily | Beginnings — journeys, purchases, agreements |
| Rikta tithi | Everyone | ~1 day | 6 times a lunar month | Auspicious beginnings |
| Sade Sati | You alone | 7½ years | Every ~30 years | Nothing — it is a period to pass through, not avoid |
Notice the pattern. Every one of these restricts beginning rather than existing. None of them asks you to stop what is already running, cancel plans, or avoid worship. Chandrashtama is the narrowest and most personal of them — two and a quarter days in every twenty-seven, and only yours.
It is about a twelfth of your days. Two and a quarter days in every twenty-seven works out to roughly thirty days a year. Something occupying that much of the calendar cannot reasonably be treated as a period of danger, and the tradition does not treat it as one — it advises postponing beginnings, which is a modest and practical instruction.
Do not rearrange a life around it. If a wedding, an operation or a flight falls on your Chandrashtama and cannot move, it moves nothing. Where a family member’s Chandrashtama conflicts with another’s on a shared occasion — which is common, since everyone’s differs — the date is chosen on other grounds entirely.
Where it is genuinely useful is small and voluntary. Choosing which of two days to sign something, when to begin a course, when to have a difficult conversation. That is the register it belongs in. For anything larger, the muhurta is calculated properly from the whole chart. Muhurat Finder →
Sign in once and every one of these fills itself in from the same birth details.
Your birth star and rashi, which these dates are counted from.
Dates for something specific, with your Chandrashtama excluded.
The periods that apply to everyone — Rahu Kalam and the rest.
The other personal Saturn period, frequently confused with this.
Almost everything in a panchang applies to everyone at once. The tithi is the same for a city, Rahu Kalam is the same for a city, the nakshatra of the day belongs to the day rather than to a person. Chandrashtama is one of the few timing rules that is genuinely individual — calculated from your own birth Moon, and different for the person sitting beside you.
The reasoning is straightforward. The Moon governs the mind in Vedic astrology, and the eighth house governs what unsettles and what surfaces unexpectedly. When the Moon passes through the eighth from where it stood at your birth, the tradition reads the mind as temporarily less steady — not afflicted, not endangered, simply not at its most reliable. So one postpones the decisions that deserve a clear head.
Used at that scale it is sensible and unremarkable. It becomes a burden only when treated as a prohibition rather than a preference, which is not how the texts frame it and not how most families use it.
Chandrashtama is one factor among many. For a marriage, a griha pravesh or a business opening, the date is chosen from the full panchang and from the charts of everyone involved — with each person’s Chandrashtama taken into account rather than treated as decisive.