Govatsa

https://www.hindujagruti.org/hinduism/why-is-the-vrat-of-govatsa-dwadashi-performed-before-dipavali
https://www.ganeshaspeaks.com/festival-calendars/information/govatsa-dwadashi-vagh-baras-vasu-baras/
http://www.shreesanwaliyaji.com/blog/tag/nandini-vrat
http://hindupad.com/tag/nandini-vrat/
https://www.youtube.com/results?search_query=Govatsa
https://www.slideshare.net/search/slideshow?searchfrom=header&q=Govatsa
http://www.drikpanchang.com/search/drikpanchang-site-search.html?dpkeyterms=govatsa