You can retrospectively add diary entries for films you’ve marked as watched, in order to complete your Diary. If you need the activity dates for when you marked each film, these are included in your account export bundle, which you can download in Settings. (If you’d like to automate this process and you know your way around a computer, grab the relevant CSV file from the export bundle, rename the Date column to Watched Date, and then use our importer to add the diary entries to your account—you’ll have the chance to check them before they’re finalized.)