Vocabulary What does 3日 (みっか, mikka) mean? 3日 (みっか, mikka) means 3rd day of the month. Quick factsReadingみっかRomajimikkaPart of speechnoun 3日みっかmikka3rd day of the month1noun 3rd day of the month2noun three daysAlso written: 三日Kanji in this word日day; sun