Polars.Naive_dateNaive_date.t is an *unzoned* date type used by polars.
The underlying Rust type is chrono::naive::NaiveDate (https://docs.rs/chrono/latest/chrono/naive/struct.NaiveDate.html).
val create : year:int -> month:int -> day:int -> t optionval of_date : Core.Date.t -> tval to_date_exn : t -> Core.Date.tval of_string : string -> tval to_string : t -> stringval pp : Stdlib.Format.formatter -> t -> unit