What is the 23 hour diet?

Could you please explain what exactly is the 23 hour diet and how it works? I'm curious to know if it's a new trend in weight loss or if it has been around for a while. What are the benefits and drawbacks of following this type of diet? Also, are there any specific foods that should be consumed or avoided during the 23 hour period? And finally, is there any scientific evidence to support its effectiveness?