Design Principle
Dates, numbers, currency, units, and language direction should match the user's locale and avoid ambiguity.
Principle Dates, numbers, currency, units, and language direction should match the user's locale and avoid ambiguity.
Design action Format dates, numbers, currency, and units by locale; use full text or ISO support for critical dates to avoid ambiguity.
Examples Positive example: Multilingual products, accounts, billing, orders, schedules, and reports support Chinese and English. Counterexample: Dates appear only as 06/07.
Apply when Multilingual products, accounts, billing, orders, schedules, and reports support Chinese and English. Users need to judge state, scope, risk, or next action quickly.
Source notes Source note: Synthesized from W3C WCAG 2.2, Apple Accessibility, IBM Carbon Accessibility, and accessibility practices in major design systems.
Agent Directive
Format dates, numbers, currency, and units by locale; use full text or ISO support for critical dates to avoid ambiguity.