Use today as the compat date instead of relying on the actual workerd compat date by dario-piotrowicz · Pull Request #13051 · cloudflare/workers-sdk

dario-piotrowicz · 2026-03-25T01:00:30Z

Fixes https://jira.cfdata.org/browse/DEVX-2446

This PR simplifies the logic we've been using for determining the local compatibility date to use. From now on we simply use today as the compatibility date, this should always reliably work since now workerd supports dates up to 7 days in the future.

Tests
- Tests included/updated
- Automated tests not possible - manual testing has been completed as follows:
- Additional testing not necessary because:
Public documentation
- Cloudflare docs PR(s): TODO
- Documentation not necessary because: there are no user-facing changes that need documenting

A picture of a cute animal (not mandatory, but encouraged)

changeset-bot · 2026-03-25T01:00:35Z

🦋 Changeset detected

Latest commit: d3d3efd

The changes in this PR will be included in the next version bump.

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

github-actions · 2026-03-25T01:02:30Z

⚠️ Issues found

`.changeset/remove-getLocalWorkerdCompatibilityDate.md`

Version type mismatch: This changeset uses minor for removing getLocalWorkerdCompatibilityDate from @cloudflare/workers-utils's public API, but removing a public export is a breaking change and should be major.

This is inconsistent with .changeset/remove-formatCompatibilityDate.md in the same PR, which correctly uses major for the analogous removal of formatCompatibilityDate from @cloudflare/workers-utils. Both changesets describe the same kind of change (removing a public export from the same package), so they should use the same version bump.

All other changesets look good:

deprecate-supportedCompatibilityDate.md — minor for deprecation is correct per guidelines.
remove-formatCompatibilityDate.md — major for removing a public export is correct.
use-today-date-for-compat.md — patch for a reliability bug fix is appropriate.
vite-plugin-compat-date-today.md — minor for a behavior change + deprecation is appropriate.
workers-utils-get-todays-date.md — minor for a new exported utility function is correct.

pkg-pr-new · 2026-03-25T01:06:51Z

create-cloudflare

npm i https://pkg.pr.new/create-cloudflare@13051

@cloudflare/kv-asset-handler

npm i https://pkg.pr.new/@cloudflare/kv-asset-handler@13051

miniflare

npm i https://pkg.pr.new/miniflare@13051

@cloudflare/pages-shared

npm i https://pkg.pr.new/@cloudflare/pages-shared@13051

@cloudflare/unenv-preset

npm i https://pkg.pr.new/@cloudflare/unenv-preset@13051

@cloudflare/vite-plugin

npm i https://pkg.pr.new/@cloudflare/vite-plugin@13051

@cloudflare/vitest-pool-workers

npm i https://pkg.pr.new/@cloudflare/vitest-pool-workers@13051

@cloudflare/workers-editor-shared

npm i https://pkg.pr.new/@cloudflare/workers-editor-shared@13051

wrangler

npm i https://pkg.pr.new/wrangler@13051

commit: d3d3efd

workers-devprod · 2026-03-30T22:00:43Z

Codeowners approval required for this PR:

✅ @cloudflare/wrangler

Show detailed file reviewers

petebacondarwin

A few nits but LGTM

packages/miniflare/src/plugins/core/index.ts

packages/miniflare/src/runtime/index.ts

packages/vite-plugin-cloudflare/src/index.ts

packages/vitest-pool-workers/src/pool/index.ts

packages/wrangler/src/api/startDevWorker/ConfigController.ts

… compat date

Co-authored-by: devin-ai-integration[bot] <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Co-authored-by: Pete Bacon Darwin <pete@bacondarwin.com>

workers-devprod

Codeowners reviews satisfied

… compat date (#13051) Co-authored-by: devin-ai-integration[bot] <158243242+devin-ai-integration[bot]@users.noreply.github.com> Co-authored-by: Pete Bacon Darwin <pete@bacondarwin.com>

workers-devprod added this to workers-sdk Mar 25, 2026

github-project-automation bot moved this to Untriaged in workers-sdk Mar 25, 2026

dario-piotrowicz mentioned this pull request Mar 25, 2026

Remove getLocalWorkerdCompatibilityDate from workers-utils and re-export supportedCompatibilityDate from miniflare instead #12387

Closed

5 tasks

This comment was marked as resolved.

Sign in to view

This comment was marked as outdated.

Sign in to view

dario-piotrowicz force-pushed the dario/no-today-as-compat-date branch 4 times, most recently from b777740 to dac44eb Compare March 25, 2026 01:34

penalosa linked an issue Mar 25, 2026 that may be closed by this pull request

wrangler should not implicitly change compat dates when workerd is outdated #12374

Closed

dario-piotrowicz force-pushed the dario/no-today-as-compat-date branch 2 times, most recently from c671d7e to 14305fe Compare March 30, 2026 21:53

dario-piotrowicz marked this pull request as ready for review March 30, 2026 22:00

dario-piotrowicz requested review from a team as code owners March 30, 2026 22:00

dario-piotrowicz requested a review from NuroDev March 30, 2026 22:00

This comment was marked as resolved.

Sign in to view

dario-piotrowicz force-pushed the dario/no-today-as-compat-date branch 2 times, most recently from 49b266b to 680b091 Compare March 31, 2026 12:03

This comment was marked as resolved.

Sign in to view

petebacondarwin approved these changes Mar 31, 2026

View reviewed changes

github-project-automation bot moved this from Untriaged to Approved in workers-sdk Mar 31, 2026

This comment was marked as resolved.

Sign in to view

dario-piotrowicz force-pushed the dario/no-today-as-compat-date branch from 07e103f to 8163340 Compare March 31, 2026 21:34

dario-piotrowicz and others added 2 commits April 1, 2026 20:22

Use today as the compat date instead of relying on the actual workerd…

afb9570

… compat date

Update packages/vitest-pool-workers/src/pool/index.ts

edcac75

Co-authored-by: devin-ai-integration[bot] <158243242+devin-ai-integration[bot]@users.noreply.github.com>

dario-piotrowicz and others added 6 commits April 1, 2026 20:22

Update packages/miniflare/src/plugins/core/index.ts

31fdbd6

Co-authored-by: Pete Bacon Darwin <pete@bacondarwin.com>

Update packages/vitest-pool-workers/src/pool/index.ts

f195100

Co-authored-by: Pete Bacon Darwin <pete@bacondarwin.com>

remove no longer numericCompare utility

610d1fa

add missing changeset and fix existing one

89152b5

convert major bump back to minor

53feaa2

fix formatting

d3d3efd

petebacondarwin force-pushed the dario/no-today-as-compat-date branch from 4fa9bf7 to d3d3efd Compare April 1, 2026 19:22

petebacondarwin requested a review from workers-devprod as a code owner April 1, 2026 19:22

workers-devprod approved these changes Apr 1, 2026

View reviewed changes

dario-piotrowicz merged commit d5bffde into main Apr 1, 2026
62 of 70 checks passed

dario-piotrowicz deleted the dario/no-today-as-compat-date branch April 1, 2026 22:58

github-project-automation bot moved this from Approved to Done in workers-sdk Apr 1, 2026

workers-devprod mentioned this pull request Apr 1, 2026

Version Packages #13141

Merged

alexanderniebuhr mentioned this pull request Apr 2, 2026

chore: adapt code to upstream deprecation withastro/astro#16192

Merged

astrobot-houston mentioned this pull request Apr 7, 2026

[ci] release withastro/astro#16244

Merged

Conversation

dario-piotrowicz commented Mar 25, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

changeset-bot bot commented Mar 25, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

🦋 Changeset detected

Uh oh!

github-actions bot commented Mar 25, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

.changeset/remove-getLocalWorkerdCompatibilityDate.md

Uh oh!

This comment was marked as resolved.

Uh oh!

This comment was marked as outdated.

pkg-pr-new bot commented Mar 25, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

workers-devprod commented Mar 30, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

This comment was marked as resolved.

Uh oh!

This comment was marked as resolved.

Uh oh!

petebacondarwin left a comment

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

This comment was marked as resolved.

Uh oh!

workers-devprod left a comment

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

3 participants

dario-piotrowicz commented Mar 25, 2026 •

edited

Loading

changeset-bot bot commented Mar 25, 2026 •

edited

Loading

github-actions bot commented Mar 25, 2026 •

edited

Loading

`.changeset/remove-getLocalWorkerdCompatibilityDate.md`

pkg-pr-new bot commented Mar 25, 2026 •

edited

Loading

workers-devprod commented Mar 30, 2026 •

edited

Loading