一いっ日ぴ

noun

first day of the month

Used mainly in business contexts, such as invoices, contracts, and schedules. Not the everyday word for the first day of the month (which is ついたち).

• 請せい求きゅう書しょには「一いっ日ぴ」を「いっぴ」と読よむことがあります。

  On invoices, 一日 is sometimes read as いっぴ.

• 契けい約やく書しょでは、支し払はらい期き日じつを「毎まい月つき一いっ日ぴ」と記き載さいし、「いっぴ」と読よませる。

  In contracts, the payment due date is written as 毎月一日 and read as いっぴ.