# `Calendar.UTCOnlyTimeZoneDatabase`
[🔗](https://github.com/elixir-lang/elixir/blob/v1.20.0-rc.3/lib/elixir/lib/calendar/time_zone_database.ex#L80)

Built-in time zone database that works only in the `Etc/UTC` timezone.

For all other time zones, it returns `{:error, :utc_only_time_zone_database}`.

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*Consult [api-reference.md](api-reference.md) for complete listing*