Import from Day One · Issue #55 · obsidianmd/obsidian-importer
Current solutions https://github.com/quantumgardener/dayone-to-obsidian https://forum.obsidian.md/t/dayone-to-obsidian-script/13387
Create a Journal Gallery View in Obsidian
Learn how to use Datavew JS in Obsidian to create a Image Gallery View of your Daily-Note Journal.