4 now.dayOfMonth // 25 val eventStartAt = LocalDateTime.of(2024, 4, 25, 18, 30, 0) // 2024/04/25 18:30:00 val eventEndAt = eventStartAt + Duration.ofMinutes(90) // 2024/04/25 20:00:00 val roomOpenAt = eventStartAt - Duration.ofMinutes(30) // 2024/04/25 18:00:00 34