来月

1. Origins, structure, and basic meaning

• Structure: 来月(らいげつ) is a time noun for the month immediately after the month in which someone is speaking.
• Basic usage: A travel plan appears in 来月旅行に行く, while a scheduled opening appears in 来月開く予定だ.

2. Common pitfalls and similar expressions

• Relative time
  • It does not name a fixed calendar month; it means the month directly following the current one.
• Omitting the particle
  • When used adverbially as in the examples, 来月 can appear without に after it.