火曜

1. Origins, structure, and basic meaning

• Structure: 火曜 (かよう) is the shortened weekday noun Tuesday.
• Basic usage: 火曜の午後 narrows the appointment to Tuesday afternoon; 毎週火曜がお休み sets a recurring weekly closure.

2. Common pitfalls and similar expressions

• Weekday modifier and recurring schedule
  • Use の before a smaller time unit, while after 毎週 the weekday can directly take が as the scheduled day.