also: ファーストデー
noun
first-day-of-the-month movie discount
Wasei-eigo term used mainly in the context of Japanese movie theaters, referring to a discount offered on the first day of each month.
wasei-eigo (Japanese-coined English), from first day
毎月1日はファーストデイで映画が安くなる。
On the first of every month, movies are cheaper because of First Day.
ファーストデイを利用して、話題の映画を観てきた。
I took advantage of First Day and went to see a popular movie.
Wasei-eigo from English 'first day', referring specifically to a movie theater discount on the first day of the month.