Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
षड् वहित्रिहुताशांकतिथयश्चाधिमासकाः । तिथिक्षयायमार्थाक्षिद्व्यष्टव्योमशराश्विनः ॥ ७१ ॥
ṣaḍ vahitrihutāśāṃkatithayaścādhimāsakāḥ | tithikṣayāyamārthākṣidvyaṣṭavyomaśarāśvinaḥ || 71 ||
Le mois intercalaire (adhimāsa) se comprend par des comptes calendaires précis—tels que «six», et les marqueurs numériques indiqués par des termes comme «vahitri», «hutāśa», «aṅka» et «tithi». De même, la perte d’un tithi (tithi-kṣaya) et l’allongement d’un tithi (tithi-āyāma) se déterminent selon les indicateurs numériques énoncés.
Sanatkumara (in dialogue instruction to Narada on dharma/observances and technical reckoning)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It safeguards dharma in practice by ensuring vows and sacred observances are timed correctly; right time (kāla) is treated as an essential limb of righteous action.
Bhakti-based vratas and worship depend on proper tithi and month reckoning; the verse supports devotion by preventing mistakes in observing fasts and holy days during adhika-māsa or tithi anomalies.
Vedāṅga Jyotiṣa: technical calendrical computation—especially identifying adhimāsa (intercalary month), tithi-kṣaya (dropped tithi), and tithi-āyāma (extended tithi) using traditional coded numeral-terms.