Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
सापार्द्धौमे बुधे हस्तान्मैत्रभात्सुरमंत्रिणि ।वैश्वदेवाद्भृगुसुते वारुणाद्भास्करात्मजे ॥ २४१ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 241.
On Tuesday, from Ashlesha. On Wednesday, from Hasta. On Thursday, from Anuradha. On Friday, from Uttara Ashadha. On Saturday, from Shatabhisha.
Simple meaning: The count starts at a different star each weekday: Ashlesha, Hasta, Anuradha, Uttara Ashadha and Shatabhisha.
हस्तर्क्षं च खाविंदौ चंद्रभं दस्रभं कुजे ।
Siddhi yoga: Hasta on Sunday, Mrigashira on Monday, Ashvini on Tuesday, Anuradha on Wednesday, Pushya on Thursday, Revati on Friday.
रोहिणी मंदवारे च सिद्धियोगाह्वया अमी ।
Rohini on Saturday completes the Siddhi days. Nanda and Bhadra fall on certain weekdays.
जयासौम्ये गुरौ रिक्ता शनौ पूर्णेति नो शुभाः ।
Some tithi and weekday pairs are not good. Then a second set of pairs starts.