To change the sheets is to take off used bedding and put clean on. Change the sheets on Sunday.
Once a week or a fortnight is the usual advice, and warm weather shortens it. A spare set means you can change the sheets without waiting for a wash.
1phrasechange the sheetsTo take off the used bedding and put clean on.
“She would change the sheets every Sunday without fail.”
change the sheets is a phrase.
Practised in Cleaning & Housework