effect-io-ai

Package: effect
Module: DateTime

DateTime.isTimeZoneNamed

Checks whether a value is a named TimeZone (IANA time zone).

When to use

Use to narrow an unknown value to the TimeZone.Named variant before reading named-zone fields such as id.

See

• isTimeZone for checking either time zone variant
• isTimeZoneOffset for narrowing to fixed-offset time zones

Signature

declare const isTimeZoneNamed: (u: unknown) => u is TimeZone.Named

Source

Since v3.6.0