定休日

1. Origins, structure, and basic meaning

• Structure: 定休日 is read as ていきゅうび and is a noun for a regularly scheduled closing day.
• Basic usage: Wednesday being the closing day appears in 水曜日が定休日だ, while checking a store’s closing day appears in 店の定休日を確認する.

2. Common pitfalls and similar expressions

• Closed weekday and prior checking
  • Mark the closed weekday with が and the checked information with を.
• Difference from 休業日
  • 定休日 is a recurring scheduled closure rather than any day of no business.