A ceremony celebrating the beginning of spring.

every year

season (period of the year based on the typical weather, e.g. winter) / season (a given period for sports, celebration, etc.)

celebrate

holding a conference or event

hold an event

new, novel / latest, recent / modern / fresh

(archaic) new, novel / (archaic) latest, recent / (archaic) modern / (archaic) fresh

(obsolete) Alternative spelling of 新たし (aratashi): new, novel

(obsolete) Same as あたらし (atarashi) above