Converting dates to ISO string format is essential for API communication, data storage, and ensuring consistent date representation across different systems and timezones. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented ISO date formatting in countless API integrations over 25 years of development. From my expertise, the most reliable approach is using the toISOString() method, which converts any Date object to the standard ISO 8601 format. This ensures universal compatibility and precise timestamp representation.

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.