Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
षड् वहित्रिहुताशांकतिथयश्चाधिमासकाः । तिथिक्षयायमार्थाक्षिद्व्यष्टव्योमशराश्विनः ॥ ७१ ॥
ṣaḍ vahitrihutāśāṃkatithayaścādhimāsakāḥ | tithikṣayāyamārthākṣidvyaṣṭavyomaśarāśvinaḥ || 71 ||
അധിമാസം ‘ഷഡ്’ മുതലായ സംഖ്യാ-ചിഹ്നങ്ങളും ‘വഹിത്രീ, ഹുതാശ, അങ്ക, തിഥി’ തുടങ്ങിയ സൂചനകളും കൊണ്ടാണ് ഗ്രഹിക്കുന്നത്. അതുപോലെ തിഥിക്ഷയവും തിഥി-ആയാമവും പറഞ്ഞ സംഖ്യാ-നിർദ്ദേശങ്ങളാൽ തന്നെ നിർണ്ണയിക്കുന്നു.
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.