Quoting_commentary for Genesis 1:8

וַיִּקְרָ֧א אֱלֹהִ֛ים לָֽרָקִ֖יעַ שָׁמָ֑יִם וַֽיְהִי־עֶ֥רֶב וַֽיְהִי־בֹ֖קֶר י֥וֹם שֵׁנִֽי׃ (פ)

And God called the firmament Heaven. And there was evening and there was morning, a second day.