Advent of Code is an annual coding event in December that provides daily programming challenges to help developers enhance their skills through engaging puzzles woven into a festive narrative by creator Eric Wastl. Participants can tackle these challenges using any programming language and environment they prefer, with the flexibility to download unique input data for processing. A suggested method for JavaScript developers includes using a Retool environment to manage input and output solutions. The article illustrates the process through the Day 1, 2022 challenge, where developers must calculate calorie totals for elves based on input text, with solutions provided for both individual and collective calorie sums. The event encourages creativity and efficiency in problem-solving, inviting developers to reflect on and improve their coding strategies.