This is the 14735th most frequent German word.
nächst
"Next."
Here, "nächstes" is used as an adjective referring to the sequential ordering of something, indicating "next."
Wer kommt als nächstes dran?
Who is next in line?
In this sentence, "nächsten" is used in the dative case, modifying "Tag," meaning "next day."
Am nächsten Tag begann das Fest.
The celebration started the next day.
Here, "nächste" serves as an attributive adjective defining "Haltestelle," indicating the following one in a sequence.