Description: This function determines if the value in a field has changed within your project workflow rule in Clarizen.
Use: The change of a field value is a common trigger for a business rule, and this function is one of the most widely used functions within the Calrizen software.
![EP1: DateSubtract()](https://b3344589.smushcdn.com/3344589/wp-content/uploads/2022/08/cover-400x284.jpg?lossy=1&strip=1&webp=1)