The 'Percy Jackson & the Olympians' series, penned by Rick Riordan, has captivated readers since the release of its first book​, 'The Lightning Thief', in 2005. This series introduces us to a world where Greek mythology intertwines with modern life, following the adventures of a young demigod named Percy Jackson. While the narrative is rich with mythological references and fantastical elements, one question often arises among fans: in what year is the first book set? This article will delve into the timeline of the series, exploring its context within both the fictional universe and the real world, while also discussing its impact on readers and culture.