The Days Since plugin for Obsidian adds a handy tooltip feature that tracks the number of days that have passed since a specific date. By simply hovering over a date in the format `YYYY-MM-DD` within your notes, users can instantly view how many days have elapsed. This tool is useful for monitoring project timelines, journal entries, or other important dates, providing an intuitive and quick way to track time directly in Obsidian without requiring additional tools.