今夜

1. Origins, structure, and basic meaning

• Structure: 今夜（こんや） is a time expression meaning tonight.
• Basic usage: Use it for this evening's plans or for suggesting something to do together at night.

2. Common pitfalls and similar expressions

• Tonight versus night in general
  • 今夜 refers to the night of the day on which one is speaking.
  • 夜 broadly names the nighttime period and can refer to a particular day or recurring nights, depending on context.