Longman Dictionary of Contemporary English
washing day
noun
EXAMPLES FROM CORPUS
▪ Ash, particularly green ash, smells like washing day.
▪ Priskin's back to his mischievous ways, though he now knows to keep a low profile on washing day.
Wiktionary
washing day
n. formerly, a day of the week on which a household’s laundry would be washed and dry; traditionally a Monday in Britain
WordNet
washing day
n. a day set aside for doing household laundry [syn: washday]
Usage examples of "washing day".
It was their washing day, you see, shed done all the scrubbing and rinsing, and had it all ready to go out by mid-morning.
The bed was narrow but comfortable, and the sheets were remarkably clean, making him guess that he'd arrived on washing day at the Palace.