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.
明日はゴミの日だから、忘れずに出さなきゃ。
Tomorrow is garbage day, so I have to remember to take it out.
ゴミの日を間違えて、昨日出してしまった。
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.