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(** The temporal identity of a date: where in the liturgical year it sits, and
the temporal cycle's own office for it. *)
type ('s, 'r) t = {
season : 's;
week : int option;
(** [None] exactly when the date falls outside every numbered week the
rite defines (e.g. a season with no week numbering at all, or a
transitional span between two numbered runs). A day being *named*
is not by itself a reason for [None]: a named day that sits inside
a numbered season run must carry that run's week the same as any
other day in it. *)
weekday : Date.weekday;
office : 'r Celebration.t;
}
[@@deriving sexp]
module type RITE = sig
val id : string
type season
type rank
val vocab : (season, rank) Vocab.t
(** First day of the liturgical year opening in civil year [y]. *)
val year_start : int -> Date.t
(** Total over 1583..9999: every date yields exactly one temporal identity. *)
val temporal : Date.t -> (season, rank) t
end
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