Shiva Purana
कालश्चैत्री पौर्णमासी देशः शिवपरिग्रहः ॥ क्षेत्रारामाद्यरण्यं वा प्रशस्तश्शुभलक्षणः ॥ ३ ॥
The time is the month of Chaitra and the full-moon-day therein. The place is anywhere acceptable to Śiva having good characteristics. It shall be auspicious, say, the garden in a holy centre or a forest.
english translation
kAlazcaitrI paurNamAsI dezaH zivaparigrahaH ॥ kSetrArAmAdyaraNyaM vA prazastazzubhalakSaNaH ॥ 3 ॥
hk transliteration by Sanscript