午後一番

1. Origins, structure, and basic meaning

• Structure: 午後一番 combines 午後, afternoon, with 一番, first in order, and is read ごごいちばん.
• Basic usage: It denotes the first scheduled action or time in the afternoon, as in 午後一番に会議がある and 午後一番で来る.

2. Common pitfalls and similar expressions

• Not an exact clock time
  • 午後一番 marks first position in the afternoon schedule; by itself it establishes neither a clock time nor that the event follows lunch.
• Difference from 午後一時
  • 午後一時 means exactly 1:00 p.m., while 午後一番 means first thing in the afternoon.