Who contributed to Elixir & Phoenix on July 23, 2026?

1 developer shipped this update, including Alexander Gubarev.

What were the notable Elixir & Phoenix updates?

Fix Calendar.ISO.valid_time? ms_precision guard (#15655), Fix Calendar.ISO.parse_time negative zero offsets in basic format (#15651), and Fix Calendar.ISO self-referencing doc in naive_datetime_to_iodata, datetime_to_iodata (#15653).

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ELIXIR FIXES CALENDAR AND COMPILER EDGE CASES ACROSS FIVE PATCHES

By RepoJournal · Filed 07:02 UTC on July 23, 2026 · About Elixir & Phoenix

1 person shipped this

Alexander Gubarev @AlexGx 5 cited

Alexander Gubarev landed five targeted fixes to Calendar.ISO and ParallelCompiler that close gaps in time parsing, validation guards, and documentation.

In brief

Elixir fixed Calendar.ISO.valid_time? guard for millisecond precision. small fix, but guard clauses are easy to mess up.
Calendar.ISO.parse_time now handles negative zero offsets in basic format. didn't know that was even possible until it wasn't.
Calendar.ISO docs had self-referencing copy-paste in naive_datetime_to_iodata and datetime_to_iodata. oops.
Kernel docs got a wording pass. small clarifications, the kind that make docs actually readable.

The Calendar.ISO module got the heaviest attention, with fixes landing for millisecond precision validation [1], negative zero offset parsing in basic format [2], and self-referencing documentation bugs in datetime conversion functions [3]. These are not breaking changes, but they resolve real edge cases that hit developers working with strict time validation and ISO 8601 parsing. On the documentation front, kernel docs got wording clarifications [4] and ParallelCompiler had typos and phrasing tightened [5]. All five PRs came from the same contributor in a single push, suggesting these were discovered and addressed in a coordinated audit pass. The fixes are narrow and surgical, the kind that ship without ceremony but save debugging time downstream.

Action items

→ Review Calendar.ISO usage in time validation pipelines if you enforce millisecond precision elixir-lang/elixir [plan]
→ Watch for merge of these PRs and pull into your next dependency update elixir-lang/elixir [monitor]

References

[1] Fix Calendar.ISO.valid_time? ms_precision guard (#15655) elixir-lang/elixir
[2] Fix Calendar.ISO.parse_time negative zero offsets in basic format (#15651) elixir-lang/elixir
[3] Fix Calendar.ISO self-referencing doc in naive_datetime_to_iodata, datetime_to_iodata (#15653) elixir-lang/elixir
[4] Fix kernel docs wordings and clarify (#15654) elixir-lang/elixir
[5] Fix ParallelCompiler doc wordings and typos (#15652) elixir-lang/elixir

Quick answers

What shipped in Elixir & Phoenix on July 23, 2026?: Alexander Gubarev landed five targeted fixes to Calendar.ISO and ParallelCompiler that close gaps in time parsing, validation guards, and documentation. In total, 8 commits and 7 pull requests landed.
Who contributed to Elixir & Phoenix on July 23, 2026?: 1 developer shipped this update, including Alexander Gubarev.
What were the notable Elixir & Phoenix updates?: Fix Calendar.ISO.valid_time? ms_precision guard (#15655), Fix Calendar.ISO.parse_time negative zero offsets in basic format (#15651), and Fix Calendar.ISO self-referencing doc in naive_datetime_to_iodata, datetime_to_iodata (#15653).

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