---
title: "Four Blog Tooling Paths Now Share One Function and 16057 Tests Passed"
canonical: https://dxdev.com/blog/dates-in-urls-pin-a-post-to-a-day/
datePublished: 2026-10-11
---
Four places in our blog tooling, the digest, social, lesson and daily_backfill, now get a post's URL id from one function, and that id carries no date.

## One function for the URL id

The commit is titled "blog: URLs carry no date." It adds `blog/urls.py`, whose `url_id` is the one place that turns a post file name into its URL id. The digest, social, lesson and daily_backfill code all use it. It pairs with a matching commit in the landing site's repo.

## The gate

The split-gate fell back to a full local run, and 16057 passed.

## The work_date commit

The same day's log has a second commit about dates, the `work_date` backfill provenance: 394 of 695 published posts sourced, plus a line in the Analyses index.

## Why a redate can't leave a dated URL

Because `url_id` is the one place that turns a post file name into a URL id, and all four paths use it, a redate can never leave a dated URL behind.