garbage day; rubbish collection day
Refers to the designated day of the week when household garbage is collected. Often used when reminding someone or checking the schedule.
Tomorrow is garbage day, so I have to remember to take it out.
I got the garbage day wrong and put it out yesterday.
Hiragana spelling; equally natural in casual writing.
Compound of ゴミ (garbage) + の (possessive particle) + 日 (day). A straightforward modern phrase.