Mirror of Auspicious Timing

...the eighth referring to the 8th lunar day, Ashtami. The wise should always avoid the sixth, ninth, and tenth lunar days when they coincide with the Revati constellation; similarly, the eleventh day on a Saturday should be avoided by the learned.
The wise say that while Bhadra, Jaya, and Rikta lunar days Names of specific categories of lunar days: Bhadra (Prosperous), Jaya (Victorious), and Rikta (Empty/Unskilled). may be unfavorable at certain times, the Purna “Full” lunar days, such as the 5th, 10th, and 15th. lunar days grant all success when they occur at night. Brihaspati The Guru of the Gods and the regent of the planet Jupiter, often cited as an authority in astrology. says:
When the ninth day falls on a Friday, the second on a Wednesday, the fourth on a Thursday, or the sixth and seventh days fall on specific combinations, they are to be known as "Lineage-Destroyers" original: "Kulanashakah"; combinations believed to bring ill fortune to one's family or descendants if used for major rites..

According to the Gargasamhita An ancient Sanskrit text on astrology and omens attributed to the Sage Garga., the sequence of Yamaghanta Literally "The Bell of Death," this is a specific inauspicious time-period each day that is avoided for any positive or travel-related activity. is determined by the constellations Magha, Vishakha, Mula, Rohini, and Hasta.
This defect of the Yamaghanta exists only from the northern banks of the Vindhya The mountain range traditionally dividing Northern and Southern India. mountains as far as the Himalayas; it is said to never exist in other lands.

Narada A divine sage and messenger in Hindu tradition, also regarded as an authority on law and astrology. states that the combinations starting from Vishakha and others, when multiplied by the sequence of the Sun’s day Sunday, result in combinations known as Utpata (Calamity), Mrityu (Death), and Kana (Small/Piercing).

Now, the Joy-giving and other Combinations original: "Nandadi Yoga". A cycle of 28 astrological combinations (yogas) that influence the quality of a day.

These are: Ananda (Joy), Kaladanda (Staff of Time), Dhruva (Constant), Prajapati (Lord of Creatures), Saumya (Gentle), Dhvaja (Banner), Shrivatsa (Favorite of Fortune), Vajra (Thunderbolt), Mudgara (Hammer), Chatra (Umbrella), Mitra (Friend), Manasa (Mental), Ratha (Chariot), Pramada (Careless), Lambaka (Hanging), Utpata (Calamity), Mrityu (Death), Kana (Small), Siddhi (Success), Shubha (Auspicious), Amrita (Nectar), Musala (Pestle), Gada (Mace), Matanga (Elephant), Rakshasa (Demon), Chara (Movable), Sthira (Fixed), and Vardhamana (Increasing). These yield great results.

Starting from the constellation occupied by the Sun, through the day and night rules, the combination is calculated. From the Sun’s day Sunday and its respective constellation, through the hands of Mercury Wednesday, the friends of Venus Friday, and the son of the Sun Saturn/Saturday, the sequence follows the path of the gods. In the rising of the astrological results, these create the Kalavela A specific "time-appointed" period, often considered inauspicious. and the Kantaka Literally "The Thorn," another malefic period. as described by the masters.