Cargo Features

iso-8601 has no features set by default.

[dependencies]
iso-8601 = { version = "0.4.1", features = ["chrono-serde"] }
chrono-serde = serde

Enables serde of chrono

Affects chrono::serde

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

chrono chrono-serde?
serde chrono-serde?