From

Adposition

  that

Determiner

  day

Noun

  on

🔛

Adverb

,  it

Pronoun

  was

Auxiliary

  the

Determiner

  desert

🏜️

Noun

  that

Pronoun

  would

Auxiliary

  be

Auxiliary

  important

Adjective

.

From that day on, it was the desert that would be important.

From that day on, it was the desert that would be important.