Counting business days between two dates (without a library)

The development of efficient date and time calculations is a long-standing challenge in software development, particularly in industries where precise scheduling is critical, such as finance and logistics. In these sectors, even small errors can have significant consequences, making the need for reliable date arithmetic solutions a pressing concern. The growing popularity of JavaScript as a preferred language for web development has amplified the importance of robust date handling libraries and frameworks.

The emergence of this new JavaScript solution signals a shift towards more self-contained and lightweight date manipulation tools, reducing reliance on external libraries. As developers continue to seek innovative solutions for everyday problems, this approach may inspire similar endeavors, leading to a more diverse and robust ecosystem of date and time calculation tools. The proliferation of these DIY solutions could also foster a culture of community-driven problem-solving, where developers collaborate to share and refine their approaches.