Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 9 · Vastu, Griha Pravesha
वास्तु गृहप्रवेशश्च
विचैत्रेष्वेव मासेषु माघादिषु च पंचसु ।शुक्लपक्षेषु कृष्णेषु तदादिष्वष्टसु शुभम् ॥ ५२५ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 525.
Do it in the five months from Magha, leaving out Chaitra. The bright fortnights are good. In the dark fortnights, the first eight tithis (moon days) are good.
Simple meaning: Install gods in Magha, Phalguna, Vaishakha or Jyeshtha. In the dark half, only the first eight days are good.
दिनेषु यस्य देवस्य या तिथिस्तत्र तस्य च ।
Use each god's own moon day. The 2nd, 3rd and 5th to 7th days are good.
दशम्यादेश्चतसृषु पौर्णमास्यां विशेषतः ।
Days 10 to 13 and the full moon are good. So are certain stars like Hasta and Pushya.
साश्विधातृजलाधीशहरिमित्रवसुष्वपि ।
Ashvini, Rohini and a few other stars are good. Avoid Tuesday, and the Sun should be strong.