The Indian numerologist Pandit Sethuraman often selected numbers for auspicious dates that diverge from the classical Chaldean numerological model. His approach appears to be at least partially based on four key categories:
1) The primary model includes interchangeable number pairs such as 2 & 7, 1 & 4 & 8, 3 & 6, and 5 & 9. Among these, the connection between 1 & 4 is considered stronger than that between 1 & 8 or 4 & 8. This approach originates from Arabic-Persian numerology and was introduced to the West in 1903 by Sheikh Habeeb Ahmad.
2) The dual value of celestial bodies: The Sun has a dual representation in the numbers 1 & 4, while the Moon is represented by 2 & 7.
3) Triangular groupings: a) Positive – 1, 5, 7; b) Negative – 2, 4, 8; c) Positive – 3, 6, 9.
4) Vortex math, which considers number doubling patterns. Reduced values are grouped into three categories: a) 1, 2, 4, 8, 7, 5 (positive – six numbers total, with 6 being a strong and favorable number); b) 3, 6 (negative- two numbers in total, with 2 being weak number and can be interpreted as planetary opposition between Venus and Jupiter), c) 9 (neutral but powerful).
(This system of Vortex math was comprehensively presented by Marko Rodin in the early 21th century, though its roots are much older).
Now, using these criteria alone, let’s attempt to construct a framework to determine which dates may be considered auspicious.
Number 1
The interchangeable group here is 1 & 4, & 8. Numbers 4 and 8 also belong to the triangle 2 & 4 & 8. By the principle of duality, the number series becomes 1, 2, 4, and 8 (following the formula y = 2^n).
- 1 is strong and luminous.
- 8 is dark and negative.
- 4 lies in between.
Thus, the best date choices for 1 are those that correspond to its series: 1, 10, 19, and 28.
Choosing 4 is also acceptable, as it helps complete solar energy cycles—but since it belongs to the negative triangle, it may also bring instability to 1.
8 is too distant and has a negative effect on 1.
Number 2
Here we have the interchangeable pair 2 & 7—both lunar numbers.
- Through 7, number 2 reaches completeness, making 7 the first choice.
- 2 is the second.
- 1 (a strong number) is a tertiary option due to partial interchangeability between the 1 & 4 & 8 and 2 &7 groups.
Number 3
While 3 & 6 form an interchangeable pair, in vortex math this grouping is limited and seen as weak. It symbolizes planetary opposition between Jupiter (3) and Venus (6).
- The number 9 mediates between them.
- Thus, auspicious days for 6 should fall on 6 and 9.
- Relationship with 6 is considered inauspicious for 3.
Number 4
Again, the group here is 1 & 4 & 8.
- Choosing 1 helps reach completeness (first choice).
- 4 is neutral and has mixed effects (second choice).
- 8 is negative and decreases success potential for 4s, so it’s best avoided.
Number 5
The favorable pair is 5 & 9. These are the preferred dates.
Number 6
Even though 3 & 6 are paired, they represent planetary opposition.
- 9 acts as a bridge, so the favorable days are 6 and 9.
- The relationship with 3 is generally unfavorable.
Number 7
Belongs to the 2 & 7 group.
- Completeness is achieved through 2 (first choice), followed by 7.
Number 8
Also belongs to the group 1 & 4 & 8.
- 1 is the strongest choice.
- 4 can be selected secondarily but may still cause some disruption.
- 8 itself is considered inauspicious for choosing dates.
Number 9
Paired with 5 in the 5 & 9 group.
- Both are suitable, but 5 is preferred since it belongs to the strong, favorable group (1, 3, 5, 6).
| Birth Number | Favorable Dates |
| 1 | 1 > 4 |
| 2 | 7 > 2 |
| 3 | 3, 9 |
| 4 | 1 > 4 |
| 5 | 5, 9 |
| 6 | 6, 9 |
| 7 | 2 > 7 |
| 8 | 1 > 4 |
| 9 | 5 > 9 |
If we compare this model’s results with Pandit Sethuraman’s actual practices, we see that he did indeed incorporate many of these principles. However, he made slight adjustments for numbers 1 and 7 and even added unique enhancements for 8 and 9. This explanatory model does not account for all of Sethuraman’s corrections or his criteria for inauspicious dates, specially concerning 2, 7, and 9.
It’s important to note that this is not the traditional Chaldean approach, and I personally do not use it. The simplified version of the modern Chaldean tradition generally groups 1, 2, 4, and 7 together, and 3, 6, and 9 together. For instance:
- Number 1 usually aligns well with dates associated with 2, 4, and 7.
- Number 3 harmonizes with 6 and 9.
- Number 5 is said to broadly align with most numbers on the surface, but deeper connections with 3 or 8 are generally considered unfavorable.
- Number 8 is a special case: it may resonate with either 4 and 8, or with 1, 3, 5, and 6—as long as 6 is not in the form of 15, 69, 78, 87, or 96.
Interestingly, even in ancient traditions, a contrast was noted between numbers 3 and 6, likely as a kind of social commentary—pleasure and feminine charm (6) often clashed with traditional morality (3). So, I recommend some caution when mixing 3 and 6 in date selection. If unsure, look into life history or consider adding number 9 to your analysis to mitigate possible negative effects between 3 and 6.
If you’re interested in learning more about Pandit Sethuraman’s system, I highly recommend his book, Science of Fortune. It includes detailed, practical suggestions for favorable and unfavorable dates for each number. As mentioned, his recommendations may differ slightly from the model presented above. The book is especially intriguing because it presents some numerological concepts in a very different light than most Western numerology books on Chaldean numerology. Ultimately, it’s up to you to extract the best insights from both systems. Wish you the best of luck!
The Mystery of Numbers, Luck, Worlds and Planets 