noun
order date; purchase date
Refers to the date on which an order was placed, commonly used in commercial and online shopping contexts.
注文日から3日以内に発送します。
We will ship within 3 days from the order date.
領収書に注文日が記載されています。
The order date is printed on the receipt.
発注日 is a more formal term for 'order date', often used in business-to-business transactions.
Compound of 注文 (order) and 日 (day).