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Improve temporal-plaindatetime-unsupported-options tests

test262

Status: Open.

#3254 In tc39/proposal-temporal;

· ptomato opened on Jan 19, 2026

Polyfill: Exception incorrectly thrown with maximum allowed PlainYearMonth in some non-ISO calendars

Status: Open.

#3251 In tc39/proposal-temporal;

· catamorphism opened on Jan 14, 2026

<code>Intl.supportedValuesOf('timeZone')</code> does not align with tzdb canonical time zones

question

Status: Open.

#3249 In tc39/proposal-temporal;

· acalvino4 opened on Jan 13, 2026

Document compatibility issues when backzone rules are supported by only one party?

documentationAdditions to documentationAdditions to documentation

Status: Open.

#3248 In tc39/proposal-temporal;

· anba opened on Jan 12, 2026

spec: should <code>ParseTemporalCalendarString</code> AO accept strings such as <code>"2026-01[u-ca=gregory]"</code> or <code>"01-01[u-ca=gregory]"</code>?

editorial

non-prod-polyfillTHIS POLYFILL IS NOT FOR PRODUCTION USE!THIS POLYFILL IS NOT FOR PRODUCTION USE!

spec-textSpecification text involvedSpecification text involved

test262

Status: Open.

#3237 In tc39/proposal-temporal;

· fabon-f opened on Jan 2, 2026

Test coverage gap in NudgeToCalendarUnit

test262

Status: Open.

#3235 In tc39/proposal-temporal;

· catamorphism opened on Dec 20, 2025

Polyfill: Coverage gap in calendarToIsoDate

test262

Status: Open.

#3217 In tc39/proposal-temporal;

· catamorphism opened on Dec 19, 2025

confusing behavior about time zone in <code>toLocaleString</code> and <code>Intl.DateTimeFormat</code>

normativeWould be a normative change to the proposalWould be a normative change to the proposal

Status: Open.

#3212 In tc39/proposal-temporal;

· fabon-f opened on Dec 14, 2025

Reference code allows invalid time strings with fractional seconds but without minutes

non-prod-polyfillTHIS POLYFILL IS NOT FOR PRODUCTION USE!THIS POLYFILL IS NOT FOR PRODUCTION USE!

test262

Status: Open.

#3210 In tc39/proposal-temporal;

· ptomato opened on Dec 12, 2025

Improve editorial note in NudgeToCalendarUnit, step 16

editorial

spec-textSpecification text involvedSpecification text involved

Status: Open.

#3207 In tc39/proposal-temporal;

· ptomato opened on Dec 11, 2025

Surprising behavior with PlainYearMonth subtraction and constraining

needs plenary inputNeeds to be presented to the committee and feedback incorporatedNeeds to be presented to the committee and feedback incorporated

normativeWould be a normative change to the proposalWould be a normative change to the proposal

test262

Status: Open.

#3197 In tc39/proposal-temporal;

· catamorphism opened on Dec 5, 2025

Reference code has some weird case in the Chinese calendar in year 7253

non-prod-polyfillTHIS POLYFILL IS NOT FOR PRODUCTION USE!THIS POLYFILL IS NOT FOR PRODUCTION USE!

Status: Open.

#3158 In tc39/proposal-temporal;

· ptomato opened on Sep 25, 2025