How to Add a Countdown Timer in Shopify Colorblock Theme

Colorblock doesn't ship with a native countdown timer section — if you've been searching the section list for one, that's why you can't find it.

Steps

Colorblock's default section list covers slideshow, announcement bar, rich text, image banner, and similar — no countdown block is included.
For a one-off sale page, the simplest route is a Custom liquid section (available in Colorblock), pasting in a small third-party countdown snippet or embed code.
For a timer you can configure without touching code — start/end dates, styling, placement on multiple pages — a dedicated countdown app from the Shopify App Store is the more maintainable option.
Either way, place it as its own section so it's easy to remove after the sale ends, rather than editing it into an existing section.

A countdown timer is a genuine gap in Colorblock's default section list — this isn't a setting you've missed.