best kshetra or temple to visit AND best Month as per Skanda Purana

Sage Narada enquired of Lord Brahma as to which was the best month of a year, who was the best Deity to worship and which was the best Tirtha to visit. Brahma’s instant reply was that the best month of a Year was Kartika, the Supreme Deity to worship was Narayana and the most Sacred Tirtha was Badari Kshetra

https://www.kamakoti.org/kamakoti/details/skandapurana26.html

AS in 18 puranas doc

The Importance of Hindu Month, Kartik

Once, on being asked by some sages about the significance of the hindu month- Kartik, Sutji narrated the

following tale-- 'Once, Narad had asked lord Brahma the same question. At that time Lord Brahma had revealed

to Narad that 'Kartik' was supreme among all the months just as lord Vishnu is supreme among all the deities and

Badrikashram is the crown of all the places of pilgrimage. According to Brahma all these three would have greater

significance in Kaliyuga as compared to any other yuga. Kartik is very dear to Lord Vishnu and any virtuous deed

done during this month never goes without being rewarded. One important characteristic of this month is that all

the deities live in the proximity of human beings for the entire period of the month and accept everything that is

offered to them. Penance done in this month or donations made during this month is believed to give Imperishable

virtues. There is a special significance of donating food grains during this month. Similarly, worshipping Shaligram

during this month also has great significance. Observing austerities during this month or worshipping lord Vishnu

with appropriate rituals liberates one's ancestors from the tortures of the hell. Worshipping lord Vishnu with petals

of Lotus helps him to become absolved of all the sins committed in his previous many births. Worshipping lord

Vishnu with tulsi leaves helps one in getting cured of incurable diseases.