LEARNit Dictionary
quarter day
noun
/ˈkwɔːtə deɪ/
UK
/ˈkwɔːrtər deɪ/
US
1
the first day of a quarter (= a period of three months) on which payments must be made, for example at the stock exchange
روز ربع سال, روز سه ماهه, سررسید سه ماهه