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deps: bump tzdata from 2026.4 to 2026.6 - #36

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Bumps tzdata from 2026.4 to 2026.6.

Release notes

Sourced from tzdata's releases.

2026.6: Release of upstream tzdata 2026f

Version 2026.6

Upstream version 2026f released 2026-10-28T06:16:49+00:00

Briefly:

Cuba will not fall back 2026-11-01; stays on -04 through 2027-11-07. No more leap seconds, and leap second tables no longer expire. Improve 1965/1966 data for Brazil.

Changes to future timestamps

Cuba will not fall back to -05 on 2026-11-01 and instead plans to maintain -04 through 2027-11-07.

Changes to past timestamps

In 1965 Brazil ended DST on 03-31 at 24:00 not 00:00, and in 1966 it ended DST on 03-01 at 01:00 not 00:00. (Thanks to Daniel Dias Rodrigues.)

Changes to documentation and commentary

Documentation and commentary now reflect leap seconds’ demise.

Changes to commentary

Discussion on timekeeping in northwestern Ontario has been updated to reflect that provincial regulation has been issued to allow these areas to stay aligned with America/Winnipeg and follow Manitoba’s adoption of year-round -05 after all. (Thanks to Aoun Khan, Chris Walton, and Heitor David Pinto.)

Discussion on timekeeping in Saskatchewan has been updated to document its new Time Act, 2026 which comes into force on 2026-10-30. (Thanks to Heitor David Pinto.) No change is expected.

2026.5: Release of upstream tzdata 2026e

Version 2026.5

Upstream version 2026e released 2026-09-30T00:14:38+00:00.

Briefly:

Manitoba moves to permanent -05 on 2026-10-31.

Changes to future timestamps

Manitoba’s 2026-03-08 spring forward was its last foreseeable clock change, as it moved to permanent -05 thereafter. Model this with its traditional abbreviation EST. Although the change to permanent -05 legally takes place on

... (truncated)

Changelog

Sourced from tzdata's changelog.

Version 2026.6

Upstream version 2026f released 2026-10-28T06:16:49+00:00

Briefly:

Cuba will not fall back 2026-11-01; stays on -04 through 2027-11-07. No more leap seconds, and leap second tables no longer expire. Improve 1965/1966 data for Brazil.

Changes to future timestamps

Cuba will not fall back to -05 on 2026-11-01 and instead plans to maintain -04 through 2027-11-07.

Changes to past timestamps

In 1965 Brazil ended DST on 03-31 at 24:00 not 00:00, and in 1966 it ended DST on 03-01 at 01:00 not 00:00. (Thanks to Daniel Dias Rodrigues.)

Changes to documentation and commentary

Documentation and commentary now reflect leap seconds’ demise.

Changes to commentary

Discussion on timekeeping in northwestern Ontario has been updated to reflect that provincial regulation has been issued to allow these areas to stay aligned with America/Winnipeg and follow Manitoba’s adoption of year-round -05 after all. (Thanks to Aoun Khan, Chris Walton, and Heitor David Pinto.)

Discussion on timekeeping in Saskatchewan has been updated to document its new Time Act, 2026 which comes into force on 2026-10-30. (Thanks to Heitor David Pinto.) No change is expected.


Version 2026.5

Upstream version 2026e released 2026-09-30T00:14:38+00:00

Briefly:

Manitoba moves to permanent -05 on 2026-10-31.

Changes to future timestamps

Manitoba’s 2026-03-08 spring forward was its last foreseeable clock change, as it moved to permanent -05 thereafter. Model this with its traditional abbreviation EST. Although the change to permanent -05 legally takes place on 2026-10-31, temporarily model the change to occur on 2026-11-01 at 02:00 for the same reason as other recent temporary hacks. (Caution: see “NOTE FOR 2026b

... (truncated)

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Bumps [tzdata](https://github.com/python/tzdata) from 2026.4 to 2026.6.
- [Release notes](https://github.com/python/tzdata/releases)
- [Changelog](https://github.com/python/tzdata/blob/master/NEWS.md)
- [Commits](python/tzdata@2026.4...2026.6)

---
updated-dependencies:
- dependency-name: tzdata
  dependency-version: '2026.6'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file python Pull requests that update python code labels Nov 1, 2026

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