Formatting dates as YYYY-MM-DD is crucial for database storage, API communication, and HTML date inputs across web applications. As the creator of CoreUI with over 25 years of development experience, I’ve handled date formatting in thousands of components and data processing scenarios. The most reliable and widely compatible approach is using toISOString() with string splitting to extract the date portion. This method ensures consistent ISO 8601 formatting regardless of timezone complexities.

Getting the current timestamp is essential for logging, performance measurement, and unique ID generation in JavaScript applications. As the creator of CoreUI with over 25 years of development experience, I’ve used timestamps extensively in production systems for tracking user interactions and measuring component performance. The most efficient and widely supported method is using the Date.now() static method. This approach provides milliseconds since Unix epoch with minimal overhead and maximum browser compatibility.

Getting yesterday’s date is essential for data comparisons, log analysis, and building time-sensitive application features. As the creator of CoreUI with over 25 years of development experience, I’ve implemented date calculations in analytics dashboards and reporting components countless times. The most reliable method is using setDate() with getDate() - 1 which automatically handles month and year boundaries. This approach eliminates the complexity of manual date arithmetic and daylight saving time issues.