M: What command line options would I need to get the gallery-dl utility to only download images that were added after a particular date?

G: For gallery-dl, you can filter downloads by date using the --filter option combined with a date-based expression.

Command Example:

gallery-dl --filter "date >= '2024-06-01'" [URL]

Breakdown:

--filter allows conditional downloading.
date is a standard field that gallery-dl assigns to most entries (format: YYYY-MM-DD).
>= '2024-06-01' restricts it to items added on or after June 1, 2024.

Notes:

The date field is not universally available on all sites. You need to verify that the extractor you're using actually includes the date metadata for its entries.
If a site doesn’t supply dates, this filter won’t work. You can test this by adding -g to list URLs without downloading to see available metadata.

-g / --get-urls → Preview which items match the filter without downloading.
--range → Filters by index/position, not by date.
--download-archive → Keeps track of already downloaded items across sessions.

Example with Preview:

gallery-dl -g --filter "date >= '2024-06-01'" [URL]

This will show what would be downloaded without actually downloading.

Let me know if you want help finding whether a specific site's extractor supports the date field.