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Last year on a bus to Kasoa, I watched a "preacher" distribute an unknown herbal concoction to passengers - including a little girl - who drank it willingly, trustingly. That moment crystallized Ghana's pharmaceutical crisis for me: in a country where roadside vendors, influencers, and fake prophets peddle unregulated "medicine," how do ordinary people protect themselves? With falsified drugs linked to 267,000 deaths annually in sub-Saharan Africa and media houses advertising unverified products without FDA approval, I built MedVerify - a mobile app that puts drug verification power directly in users' hands through barcode scanning, manual search, and real-time data from Ghana's FDA database

Timekeeping is a fundamental aspect of software systems, yet choosing the right type of clock can make the difference between reliable performance and subtle, hard-to-debug issues. In this article, we'll explore the two primary types of clocks, wall-clock (time-of-day) and monotonic clocks, their use cases in software development, and why selecting the appropriate clock is crucial for accuracy, performance, and system robustness. We'll include practical code examples in Python, Java, JavaScript, and Dart to demonstrate their usage.