शिशिराद्युत्तरायणम् ॥ कZ_०२.२०.६१ ॥
śiśirādy uttarāyaṇam
อุตตรายณะเริ่มต้นด้วยศิศิระ (ฤดูหนาว)
It divides the year into predictable half-year blocks used for planning campaigns, audits, and seasonal resource management.