type t = Time_float_unix.tA timestamp is just a core time instance that was converted from some raw json date.
val t_of_sexp : Sexplib0.Sexp.t -> tval sexp_of_t : t -> Sexplib0.Sexp.tval to_string : Time_float_unix.t -> Base.String.tval to_yojson : Time_float_unix.t -> [> `String of Base.String.t ]val of_yojson_with_span :
(Core.Float.t -> Core.Time_float.Span.t) ->
[< `Assoc of (string * Yojson.Safe.t) list
| `Bool of bool
| `Float of float
| `Int of int
| `Int64 of int64
| `Intlit of string
| `List of Yojson.Safe.t list
| `Null
| `String of string
| `Tuple of Yojson.Safe.t list
| `Variant of string * Yojson.Safe.t option ] ->
(Time_float_unix.t, string) Base.Result.tval of_yojson : Yojson.Safe.t -> (Time_float_unix.t, string) Base.Result.tval of_string : string -> Time_float_unix.t