The Daily notes opener plugin streamlines the process of managing daily notes in Obsidian. It introduces a command and a sidebar button to open today's daily note in a new pane while avoiding redundancy by focusing on an already opened note if applicable. Users can define the end-of-day time to determine the correct daily note at midnight, ensuring accurate entries. Additionally, the plugin allows appending lines to specific sections of the note upon opening and supports background color customization for better visual distinction, leveraging the Style Settings plugin for themed adjustments. It seamlessly integrates with the Periodic Notes plugin when enabled, ensuring consistent behavior across tools for handling daily notes.