Daily Note is a note dated to a single calendar day that a note-taking app opens or creates for today, serving as the default place to capture tasks, journal entries, and links to other notes.
📝Obsidian ships the pattern as a core plugin that opens a note based on today's date, or creates it if it does not exist. By default the note is named in YYYY-MM-DD format, and users can set a template, a folder, and a custom date format. Its documentation suggests daily notes for journals, to-do lists, and daily logs.
A daily note works as an entry point into a wider body of notes. In tools built on 📝Networked Thought, linking from the day's page to a person, project, or idea lets 📝Bidirectional Links / Backlinks surface that day on the linked note, so the chronological record doubles as an index. 📝Reflect is built around this pairing of daily notes and backlinks, with each day starting from today's note.
In 📝MythOS, the equivalent is the 📝Daily Memo: one entry per day holding a Tasks checklist and a Timeline, adapted from the 📝Bullet Journal method, with tags extracted on save so a theme can be followed across days.
I practice a version of the Bullet Journal method in my daily memo every day. Most of my new and updated memos are catalyzed by what I write there, which makes my memo feed ever more of a look into the activity of my mind.