Proto-Slavic *sь

→ Bulgarian днес (mention)

→ Bulgarian денес (mention)

→ Bulgarian днеска (mention)

→ Old Church Slavonic сь (inherited)

→ Lithuanian šis (cognate)

→ Latvian šis (cognate)

→ Macedonian денес (mention)

→ Macedonian денеска (mention)

→ Old East Slavic дьньсь (mention)

→ Russian днесь (mention)

→ Russian сегодня (mention)

→ Russian сей (inherited)

→ Russian -сь (inherited)

→ Serbo-Croatian se (inherited)

→ Serbo-Croatian се (inherited)

→ Serbo-Croatian simo (derived)

→ Serbo-Croatian noćas (derived)

→ Serbo-Croatian ноћас (derived)

→ Serbo-Croatian симо (derived)

→ Ukrainian цей (derived)