“Equals” filter on updatedAt field doesn’t return results when selecting the same date via DatePicker

Describe the Bug

The native “equals” filter for the updatedAt field (and other date fields) fails to match documents when I pick the same date shown in the document list. Even though the calendar picker and the list display the identical date (e.g. 2025-05-14), no documents are returned.

Link to the code that reproduces this issue

https://github.com/matteo-naif/payloadcms-test-date-filter

Reproduction Steps

1. Navigate to a collection in Payload CMS that includes an updatedAt timestamp field.
2. Open the list view for that collection.
3. Note a document’s “Updated At” date (for example, May 14, 2025).
4. Click “Add Filter”, choose the updatedAt field, select the “equals” condition.
5. Use the date picker to select the exact same date displayed in the list (2025-05-14).
6. Apply the filter.

Which area(s) are affected? (Select all that apply)

area: core

Environment Info

Binaries:
  Node: 20.12.2
  npm: 10.5.0
  Yarn: 1.22.22
  pnpm: 9.6.0
Relevant Packages:
  payload: 3.37.0
  next: 15.3.0
  @payloadcms/db-mongodb: 3.37.0
  @payloadcms/email-nodemailer: 3.37.0
  @payloadcms/graphql: 3.37.0
  @payloadcms/next/utilities: 3.37.0
  @payloadcms/payload-cloud: 3.37.0
  @payloadcms/richtext-lexical: 3.37.0
  @payloadcms/translations: 3.37.0
  @payloadcms/ui/shared: 3.37.0
  react: 19.1.0
  react-dom: 19.1.0
Operating System:
  Platform: darwin
  Arch: x64
  Version: Darwin Kernel Version 24.4.0: Fri Apr 11 18:33:47 PDT 2025; root:xnu-11417.101.15~117/RELEASE_ARM64_T6000
  Available memory (MB): 32768
  Available CPU cores: 10