RFC 3339
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<timefyi-glossary slug="rfc-3339"></timefyi-glossary>Definición
Un estándar de internet para la representación de fecha y hora, basado en ISO 8601 pero más estricto. Requiere el separador 'T' y el desplazamiento de zona horaria (p. ej., '2026-02-25T10:30:00+09:00'). Ampliamente usado en APIs REST.