In Calgary, Canada, Peter Adeleke, a Nigerian-born author and leadership coach, taught for 28 hours and 45 minutes, thereby setting a new Guinness World Record for the longest leadership course.
The previous record of 24 hours was to be surpassed by Adeleke, who started the marathon lecture in August with a target of 30 to 48 hours.
He declared in an Instagram post on Monday that he was now a title holder after the Guinness World Records had accepted his attempt.
We are happy to notify you that your application for the longest leadership lesson was accepted, and you are now the Guinness World Records Title Holder! This is a partial screenshot of the GWR confirmation email.
On its official website, GWR verified the record, saying, “On August 30, 2025, Peter Adeleke (Canada) in Calgary, Canada, achieved the longest leadership lesson, which is 28 hours and 45 minutes.”
“Peter is an accomplished leadership specialist, speaker, and writer. He set out to break the leadership narrative by setting a record in the field.
“He aspires to elevate the standard for leadership development and ignite discourse regarding transformational leadership.”
In addition, Adeleke celebrated the milestone by posting on Instagram, “It’s official! He trains my hands for battle, so that my arms can break a steel bow. Praise be to the Lord for my strength, which teaches my mouth to speak, my hands to fight, and my fingers to war.
The announcement that I now hold the Guinness World Record for the Longest Leadership Lesson in history is an honor and a source of great humility.
It was grace, resiliency, and the steadfast support of an amazing team that made this journey possible, not strength. All honor belongs to God alone.
He went on to clarify why he didn’t meet his original 48-hour target on his website, writing, “I had originally set out to teach for 48 hours, but I completed the feat in 28 hours instead.”
In leadership and in life, I’ve discovered that success isn’t necessarily about meeting your exact goals. It’s about challenging yourself, finding your actual boundaries, and making a significant difference in the process.
“Have I broken the record? Indeed, I did, and it’s now verified and official! What was most important was breaking the previous record of 24 hours, which I did by giving a 28-hour leadership lesson.
Adeleke’s accomplishment places her among an increasing number of Nigerians who possess a Guinness World Record.
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