अर्धन्यूनश्चान्द्रमासः ॥ कZ_०२.२०.४९ ॥
ardhanyūnaś cāndramāsaḥ
சாந்திர மாதம் அரை நாள் குறைவு (அதாவது இருபத்தொன்பது மற்றும் அரை பகல்-இரவு) ஆகும்.
It gives a computable conversion rule between lunar dating (used in society) and fixed administrative cycles (wages, audits, deadlines).
Administrative rationalization: define uniform units and conversion rules so the state can plan, collect, pay, and adjudicate consistently across time and territory.