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Document calendar validity ranges

C-calendarComponent: CalendarsComponent: Calendars

milestone-non-blockingThese issues are in a milestone, but do not block the milestone (and can be removed if necessary)These issues are in a milestone, but do not block the milestone (and can be removed if necessary)

U-temporalUser: Temporal and V8User: Temporal and V8

Status: Open.

#6459 In unicode-org/icu4x;

· hsivonen opened on Apr 15, 2025

Create and review 2.1 API changelog and CHANGELOG.md

C-processComponent: Team processesComponent: Team processes

Status: Open.

#7080 In unicode-org/icu4x;

· sffc opened on Oct 13, 2025

Improve testing of simulated astronomical calendar invariants

C-calendarComponent: CalendarsComponent: Calendars

milestone-non-blockingThese issues are in a milestone, but do not block the milestone (and can be removed if necessary)These issues are in a milestone, but do not block the milestone (and can be removed if necessary)

Status: Open.

#7121 In unicode-org/icu4x;

· sffc opened on Oct 18, 2025

Mark Date::from_fields as unstable

Status: Open.

#7155 In unicode-org/icu4x;

· Manishearth opened on Oct 23, 2025

Update to CLDR 48-final

Status: Open.

#7164 In unicode-org/icu4x;

· Manishearth opened on Oct 23, 2025