chore(deps): bump date-fns from 2.30.0 to 4.2.1 in /ffm

[dependabot]

Bumps date-fns from 2.30.0 to 4.2.1.

Release notes

Sourced from date-fns's releases.

v4.2.1

Fixed

• Fixed type definitions missing in v4.2.0 due to TypeScript misconfiguration.

v4.2.0

This is a minor release in all senses, it only includes documentation updates (first of many) that points to the new You Don't Need date-fns* page.

* Not really

Changed

• Added Temporal API references to the JSDoc annotations of add, addBusinessDays, and addDays.

v4.1.0

This release adds time zone support to format functions (that I somehow missed when working on the feature) and fixes a few bugs.

Make sure also upgrade TZDate to v1.0.2 as it includes a bunch of critical bug fixes.

Fixed

• Fixed internal constructFrom throwing an exception on null arguments. While null isn't allowed, the functions should rather return Invalid Date or NaN in such cases. See #3885.

Added

• Added missing time zone support to format, formatISO, formatISO9075, formatRelative and formatRFC3339. See #3886.

v4.0.0

I have great news! First, ten years after its release, date-fns finally gets first-class time zone support.

Another great news is that there aren't many breaking changes in this release. All of them are type-related and will affect only those explicitly using internal date-fns types. Finally, it has been less than a year since the last major release, which is an improvement over the previous four years between v2 and v3. I plan on keeping the pace and minimizing breaking changes moving forward.

Read more about the release in the announcement blog post.

- Sasha @​kossnocorp

Added

• Added time zones support via @date-fns/tz's TZDate class and tz helper function. See its README for the details about the API.

• All relevant functions now accept the context in option, which allows to specify the time zone to make the calculations in. If the function also returns a date, it will be in the specified time zone:

  import { addDays, startOfDay } from "date-fns";
  import { tz } from "@date-fns/tz";
  startOfDay(addDays(Date.now(), 5, { in: tz("Asia/Singapore") }));
  //=> "2024-09-16T00:00:00.000+08:00"

... (truncated)

Changelog

Sourced from date-fns's changelog.

v4.2.1 - 2026-05-19

Fixed

• Fixed type definitions missing in v4.2.0 due to TypeScript misconfiguration.

v4.2.0 - 2026-05-18

This is a minor release in all senses, it only includes documentation updates (first of many) that points to the new You Don't Need date-fns* page.

* Not really

Changed

• Added Temporal API references to the JSDoc annotations of add, addBusinessDays, and addDays.

v4.1.0 - 2024-09-17

This release adds time zone support to format functions (that I somehow missed when working on the feature) and fixes a few bugs.

Make sure also upgrade TZDate to v1.0.2 as it includes a bunch of critical bug fixes.

Fixed

• Fixed internal constructFrom throwing an exception on null arguments. While null isn't allowed, the functions should rather return Invalid Date or NaN in such cases. See #3885.

Added

• Added missing time zone support to format, formatISO, formatISO9075, formatRelative and formatRFC3339. See #3886.

v4.0.0 - 2024-09-16

I have great news! First, ten years after its release, date-fns finally gets first-class time zone support.

Another great news is that there aren't many breaking changes in this release. All of them are type-related and will affect only those explicitly using internal date-fns types. Finally, it has been less than a year since the last major release, which is an improvement over the previous four years between v2 and v3. I plan on keeping the pace and minimizing breaking changes moving forward.

Read more about the release in the announcement blog post.

- Sasha @​kossnocorp

Added

• Added time zones support via @date-fns/tz's TZDate class and tz helper function. See its README for the details about the API.

• All relevant functions now accept the context in option, which allows to specify the time zone to make the calculations in. If the function also returns a date, it will be in the specified time zone:

  import { addDays, startOfDay } from "date-fns";
  import { tz } from "@date-fns/tz";

... (truncated)

Commits

• 87635a8 Fix missing type definitions, promote to v4.2.1 (closed #4190)
• 3d4ca4b Update browserslist
• 562c485 Promote to v4.2.0
• 3709c02 Make steps into the Temporal-first future
• 07592b9 Upgrade Node.js types, upgrade TypeScript
• 09ece22 Upgrade Vitest
• c37c22e Set up Oxfmt as the default formatter
• d40bb80 Upgrade mise setup
• dd66398 Fix tz tests workflow
• ef962f8 Adjust smoke tests
• Additional commits viewable in compare view

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