DateTimeExcept

DateTimeExcept is a concept or library that deals with date and time manipulation, specifically focusing on the exclusion or removal of specific date and time intervals from a larger period. It allows users to define a main date or time range and then subtract one or more other date or time ranges from it. This can be useful in various scenarios, such as scheduling, resource allocation, or time tracking, where certain periods need to be marked as unavailable or unprocessable.

The core functionality of DateTimeExcept typically involves operations like subtracting a single interval, subtracting multiple disjoint intervals, or subtracting a recurring set of intervals. For example, one might want to calculate the total working hours in a month excluding weekends and public holidays. In this case, the month would be the main date range, and weekends and holidays would be the intervals to be excepted.

Libraries that implement DateTimeExcept often provide methods to create and manage these date and time intervals. They might also offer functionalities for comparing, merging, or converting these intervals. The complexity of a DateTimeExcept implementation can vary, ranging from simple handling of discrete intervals to sophisticated management of recurring events and time zones. The goal is to provide a robust and flexible way to represent and compute with time periods that have specific parts removed.