Translates from the Bengali as happy or auspicious Saturday. That 7th day of the week is the traditional sabbath for the Hebrew people. Roman Emperor Constantine switched the sabbath to Sunday, because the Church needed to assimilate all the Pagans in Europe that worshipped the Sun god as their central Deity. There are Sanskrit texts that depict Shani (or Shanaishchara 'one who moves slowly' and its orbit is the longest of the nava-graha, being about 30 years), who is the son of Surya (the Sun) as more powerful than Vishnu and Siva. There is a Shani cult in West Bengal. vymaps.com/IN/Dhupguri-Shani-Mandir-131179/
One could say the Bangla pantheon has 3 central Ista-devatas: Krishna, Durga and Shani.
Shani's gemstone is blue sapphire.
Ha Gauranga Nityananda Sri Advaitachandra | Gadadhara Srivasadi yata bhakta vrinda ||