The Apply Patterns plugin for Obsidian enables users to apply customizable find-and-replace patterns to their notes using regular expressions. This tool is ideal for automating text formatting, including handling natural language dates, and offers powerful options such as applying changes to selected text, entire documents, or clipboard contents. Users can create patterns for tasks such as marking tasks as completed, rescheduling tasks, or modifying text based on specific rules. The plugin also allows for importing and exporting patterns, and it supports dynamic date expressions. It is highly customizable, making it a valuable tool for automating repetitive note-editing tasks and improving organization.