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Unlucky Dates Are Tithis, Not Birth Months
The 4th, 9th, and 14th tithis of a paksha are rikta, and muhurta practice sets them aside for many auspicious starts. They apply to everyone that day. Your birth month does not mint a second, private calendar of unlucky dates.
A lunar day is not a Gregorian date
A tithi can begin at any hour and can cover parts of two civil dates. The 4th tithi this month is not the 4th of the English month, and it will not fall on the same weekday next year. Pages that list unlucky dates from January birthdays through December birthdays are numbering a civil calendar. Vimshottari does not contain that table. The Moon changes sign about every two and a quarter days, so a birth month is not even one Chandra rashi.
What can be personally quieter
Some samskara rules avoid the janma nakshatra, the Moon's birth star, when it returns on a single day. That is one nakshatra, not a month. Sade Sati is personal and long: Saturn on the 12th, 1st, and 2nd from your Moon. It is not a list of dates inside your birth month. The 8th lord's antardasha is a personally heavy bhukti, and its dates come from your Moon's nakshatra balance. Those dates differ for people born in the same month.
How to use a real caution
If you are choosing a wedding, a griha pravesh, or a shop opening, avoid rikta tithis, avoid Bhadra, and choose a fitting nakshatra and a fixed lagna. If you are not choosing the hour, a public exam or an interview the employer fixed, the tithi is information, not a veto you can use. Your birth month adds nothing to that choice. The birth city adds the lagna, which decides who your 8th lord is. That lord's period is the closest thing to a personal heavy season, and it is measured in months or years, not in a printed unlucky Tuesday.
Frequently asked questions
Which lunar days are rikta?
The 4th, 9th, and 14th of a paksha. They are avoided for many shubha starts, for every chart, on the days the panchang says they are running.
Does my birth month have its own bad dates?
No. Personal weight comes from your dasha and, for some rites, from the return of your janma nakshatra. The civil month is not a nakshatra.
Is the 4th of every month unlucky?
No. The 4th tithi is a lunar day and moves. It is not the 4th on a wall calendar.
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D1, D9, D10, dashas, yogas, and transits, the same calculations referenced in this article.