noun
release date; day something goes on sale
Used for the date a product, book, CD, game, etc. becomes available for purchase.
新しいゲームの発売日は来月の10日です。
The release date for the new game is the 10th of next month.
発売日を楽しみに待っています。
I'm looking forward to the release date.
発行日 is used for the date of issue of publications, tickets, or official documents, whereas 発売日 focuses on the date of sale to the public.
Compound of 発売 (release, sale) and 日 (day).