Can a scheduled discount apply to a whole category? How?

Yes. A scheduled price can target either a specific product or an entire category. When it targets a category, the time-bound price applies category-wide for the window — so you can run "20% off all Audio this weekend" without editing each product. The scheduled-price record carries the target (a product id or a category id) and the window; the price-resolution logic applies it to the…

Yes. A scheduled price can target either a specific product or an entire category. When it targets a category, the time-bound price applies category-wide for the window — so you can run "20% off all Audio this weekend" without editing each product. The scheduled-price record carries the target (a product id or a category id) and the window; the price-resolution logic applies it to the matching products while it's live. This makes broad, time-limited promotions practical to run across many products at once.