Where does “sobotní” come from?

sobotní (Czech) comes from Czech Sobota, from Old Czech sobota, from Proto-Slavic sǫbota, from Hebrew שַׁבָּת, from Akkadian šapattum.

sobotní (Czech): Saturday

Definitions

Step	Language	Word	Meaning
1	Czech	Sobota	—
2	Old Czech	sobota	—
3	Proto-Slavic	sǫbota	Saturday
4	Hebrew	שַׁבָּת	Sabbath, Shabbat; weekly day of rest; sabbath
5	Akkadian	šapattum	—

sobotní — Etymology, Origin & Word History | Etymology Explorer