पञ्चदशमुहूर्तो दिवसो रात्रिश्च चैत्रे चाश्वयुजे च मासि भवतः ॥ कZ_०२.२०.३७ ॥
pañcadaśa-muhūrto divaso rātriś ca caitre cāśvayuje ca māsi bhavataḥ
In the months of Caitra and Āśvayuja, the day and the night are each fifteen muhūrtas (i.e., equal in length).
They function as equal-day-and-night reference points for adjusting duty schedules and operational timings across the seasonal cycle.
30 muhūrtas total (15 day + 15 night).