Twenty-Four Hour Expert is a podcast for people who enjoy random trivia facts. Each week, one of the two hosts educates themselves about a specific topic and teaches it to the other. The subjects range from serious issues to light-hearted conversations and obscure details. For instance, one episode talks about Tylenol poisoning. It discusses a case in the 1980s that led to new laws and regulations. Another installment explores unknown Olympic sports. It reviews everything from ski ballet to bowling and asks why they are not more familiar.

The two hosts of Twenty-Four Hour Expert have been friends for over a decade. They love learning fun facts but don't think of themselves as experts in anything. Ali is a wife and mother. She works for an investment banker but is not an investment banking expert. The only topic she has spent hours learning about is the TV show The Office. Dan works for a software company and has two wonderful dogs. He has nerdy expertise in things like Disney and Lego.

The podcast's goal is not to discuss what they already know. The hosts alternate in each episode and give themselves a whole day to learn about a new topic. They must understand it well enough to explain it to the other host and the listeners. The conversations on the podcast are easygoing and entertaining. It feels like two friends having a drink at a bar while bringing up arbitrary facts.

In one podcast episode, Dan explains the concept of daylight saving time to Ali. He describes a good way to know which way the clock goes. It either springs forward or falls back, according to the season. In another episode, Ali learns what mollusks are and the slimy animals that are a part of that group. The host who didn't do the research asks questions to understand the topic better. They make each other laugh while learning something new.

In later episodes of Twenty-Four Hour Expert, Ami replaces Dan. The hosts sustain the same enjoyable chemistry.