The term “18-hour city” refers to a city that is not quite a 24-hour city like New York or Las Vegas, but it’s more active and alive beyond the typical 9-to-5 business hours. The concept suggests a city that maintains a vibrant and active urban life for approximately 18 hours a day, with a relatively active nightlife and various amenities available well into the evening.

In contrast, a traditional 9-to-5 city might see a significant decline in activity and vibrancy after typical working hours. 24-hour cities, on the other hand, tend to have a consistently high level of activity and services available at all hours.

The idea of the 18-hour city has gained attention in urban planning and real estate discussions as a way to highlight cities that strike a balance between the constant activity of a 24-hour city and the slower pace of a traditional 9-to-5 city. These cities often offer a mix of residential, commercial, and entertainment spaces that encourage people to stay and engage in the urban environment beyond typical working hours. This can contribute to a more dynamic and lively cityscape, fostering a sense of community and a diverse range of activities.