Module Core_kernel.Date

Date module.

type t = Core_kernel__.Date0.t
include module type of Core_kernel__.Date0 with type Date0.t := t
type t
include sig ... end
val bin_read_t : t Bin_prot.Read.reader
val __bin_read_t__ : (Core_kernel__.Import.int ‑> t) Bin_prot.Read.reader
val bin_reader_t : t Bin_prot.Type_class.reader
val bin_size_t : t Bin_prot.Size.sizer
val bin_write_t : t Bin_prot.Write.writer
val bin_writer_t : t Bin_prot.Type_class.writer
val bin_shape_t : Bin_prot.Shape.t
val hash_fold_t : Base.Hash.state ‑> t ‑> Base.Hash.state
val hash : t ‑> Base.Hash.hash_value
val t_of_sexp : Sexplib.Sexp.t ‑> t
val sexp_of_t : t ‑> Sexplib.Sexp.t
include Core_kernel__.Std_internal.Hashable_binable with type t := t
type t
include sig ... end
val hash_fold_t : Base.Hash.state ‑> t ‑> Base.Hash.state
val hash : t ‑> Base.Hash.hash_value
val hashable : t Hashtbl.Hashable.t
module Table : Hashtbl.S_binable with type key = t
module Hash_set : Hash_set.S_binable with type elt = t
module Hash_queue : Hash_queue.S with type Key.t = t

converts a string to a date, in formats: * m/d/y * y-m-d (* valid iso8601_extended *) * DD MMM YYYY * DDMMMYYYY * YYYYMMDD

include Core_kernel__.Std_internal.Stringable with type t := t
type t
val of_string : string ‑> t
val to_string : t ‑> string
include Core_kernel__.Std_internal.Comparable_binable with type t := t
include Core_kernel__.Comparable_intf.S_common
include Base.Comparable_intf.S
include Base.Comparable_intf.Polymorphic_compare
include Base.Comparisons.Infix
type t
val (>=) : t ‑> t ‑> bool
val (<=) : t ‑> t ‑> bool
val (=) : t ‑> t ‑> bool
val (>) : t ‑> t ‑> bool
val (<) : t ‑> t ‑> bool
val (<>) : t ‑> t ‑> bool
val equal : t ‑> t ‑> bool
val compare : t ‑> t ‑> int

compare t1 t2 returns 0 if t1 is equal to t2, a negative integer if t1 is less than t2, and a positive integer if t1 is greater than t2.

val min : t ‑> t ‑> t
val max : t ‑> t ‑> t
val ascending : t ‑> t ‑> int

ascending is identical to compare. descending x y = ascending y x. These are intended to be mnemonic when used like List.sort ~cmp:ascending and List.sort ~cmp:descending, since they cause the list to be sorted in ascending or descending order, respectively.

val descending : t ‑> t ‑> int
val between : t ‑> low:t ‑> high:t ‑> bool
val clamp_exn : t ‑> min:t ‑> max:t ‑> t

clamp_exn t ~min ~max returns t', the closest value to t such that between t' ~low:min ~high:max is true.

Raises if not (min <= max).

val clamp : t ‑> min:t ‑> max:t ‑> t Base.Or_error.t
include Base.Comparator.S with type t := t
type t
type comparator_witness
include Base.Comparable_intf.Validate with type t := t
type t
val validate_lbound : min:t Base.Maybe_bound.t ‑> t Base.Validate.check
val validate_ubound : max:t Base.Maybe_bound.t ‑> t Base.Validate.check
val validate_bound : min:t Base.Maybe_bound.t ‑> max:t Base.Maybe_bound.t ‑> t Base.Validate.check
include Core_kernel__.Comparable_intf.Map_and_set_binable with type t := t with type comparator_witness := comparator_witness
type t
include Comparator.S with type t := t
type t
type comparator_witness
include Core_kernel__.Import.Pretty_printer.S with type t := t
type t
val pp : Caml.Format.formatter ‑> t ‑> unit
val create_exn : y:Core_kernel__.Import.int ‑> m:Month.t ‑> d:Core_kernel__.Import.int ‑> t

create_exn ~y ~m ~d creates the date specified in the arguments. Arguments are validated, and are not normalized in any way. So, days must be within the limits for the month in question, numbers cannot be negative, years must be fully specified, etc.

val of_string_iso8601_basic : Core_kernel__.Import.string ‑> pos:Core_kernel__.Import.int ‑> t

For details on this ISO format, see:

http://www.wikipedia.org/wiki/iso8601

YYYYMMDD

val to_string_iso8601_basic : t ‑> Core_kernel__.Import.string

YYYYMMDD

val to_string_american : t ‑> Core_kernel__.Import.string

MM/DD/YYYY

val month : t ‑> Month.t
val year : t ‑> Core_kernel__.Import.int
val day_of_week : t ‑> Day_of_week.t
val week_number : t ‑> Core_kernel__.Import.int

Week of the year, from 1 to 53. According to ISO 8601, weeks start on Monday, and the first week of a year is the week that contains the first Thursday of the year. Notice that this means that dates near the end of the year can have week number 1, and dates near the beginning of the year can have week number 52 or 53.

Warning: the triple (year, week number, week day) does not identify a date -- e.g. 2012-01-02 and 2012-12-31 are both Mondays of week 1. (However, if instead of the year, you use the year of the nearest Thursday, then it does work.)

val is_weekend : t ‑> Core_kernel__.Import.bool
val is_weekday : t ‑> Core_kernel__.Import.bool
val is_business_day : t ‑> is_holiday:(t ‑> Core_kernel__.Import.bool) ‑> Core_kernel__.Import.bool

Monday through Friday are business days, unless they're a holiday.

val add_days : t ‑> Core_kernel__.Import.int ‑> t

add_days t n adds n days to t and returns the resulting date.

val add_months : t ‑> Core_kernel__.Import.int ‑> t

add_months t n returns date with max days for the month if the date would be invalid. e.g. adding 1 month to Jan 30 results in Feb 28 due to Feb 30 being an invalid date, Feb 29 is returned in cases of leap year.

In particular, this means adding x months and then adding y months isn't the same as adding x + y months, and in particular adding x months and then -x months won't always get you back where you were. *

val add_years : t ‑> Core_kernel__.Import.int ‑> t

add_years t n has the same semantics as add_months for adding years to Feb 29 of a leap year, i.e., when the addition results in a date in a non-leap year, the result will be Feb 28 of that year.

val diff : t ‑> t ‑> Core_kernel__.Import.int

diff t1 t2 returns date t1 minus date t2 in days.

val diff_weekdays : t ‑> t ‑> Core_kernel__.Import.int

diff_weekdays t1 t2 returns the number of weekdays in the half-open interval [t2,t1) if t1 >= t2, and - diff_weekdays t2 t1 otherwise.

val diff_weekend_days : t ‑> t ‑> Core_kernel__.Import.int

diff_weekend_days t1 t2 returns the number of days that are weekend days in the half-open interval [t2,t1) if t1 >= t2, and - diff_weekend_days t2 t1 otherwise.

val add_weekdays : t ‑> Core_kernel__.Import.int ‑> t

add_weekdays t 0 returns the next weekday if t is a weekend and t otherwise. Unlike add_days this is done by looping over the count of days to be added (forward or backwards based on the sign), and is O(n) in the number of days to add. Beware, add_weekdays sat 1 or add_weekdays sun 1 both return the next tue, not the next mon. You may want to use following_weekday if you want the next following weekday, following_weekday (fri|sat|sun) would all return the next mon.

val add_business_days : t ‑> is_holiday:(t ‑> Core_kernel__.Import.bool) ‑> Core_kernel__.Import.int ‑> t

add_business_days t ~is_holiday n returns a business day even when n=0. add_business_days ~is_holiday:(fun _ -> false) ... is the same as add_weekdays.

If you don't want to skip Saturday or Sunday, use add_days_skipping.

val add_days_skipping : t ‑> skip:(t ‑> Core_kernel__.Import.bool) ‑> Core_kernel__.Import.int ‑> t

add_days_skipping t ~skip n adds n days to t, ignoring any date satisfying skip, starting at the first date at or after t that does not satisfy skip. For example, if skip t = true, then add_days_skipping t ~skip 0 > t.

add_business_days and add_weekdays are special cases of add_days_skipping.

val dates_between : min:t ‑> max:t ‑> t Core_kernel__.Import.list

the following returns a closed interval (endpoints included)

val business_dates_between : min:t ‑> max:t ‑> is_holiday:(t ‑> Core_kernel__.Import.bool) ‑> t Core_kernel__.Import.list
val weekdays_between : min:t ‑> max:t ‑> t Core_kernel__.Import.list
val previous_weekday : t ‑> t
val following_weekday : t ‑> t
val first_strictly_after : t ‑> on:Day_of_week.t ‑> t

first_strictly_after t ~on:day_of_week returns the first occurrence of day_of_week strictly after t.

val is_leap_year : year:Core_kernel__.Import.int ‑> Core_kernel__.Import.bool

is_leap_year ~year returns true if year is considered a leap year

val unix_epoch : t

The starting date of the UNIX epoch: 1970-01-01

gen generates dates between 1900-01-01 and 2100-01-01.

include Core_kernel__.Std_internal.Quickcheckable with type t := t
type 'a gen
type 'a obs
type 'a shr
type t
val gen : t gen
val obs : t obs
val shrinker : t shr
val gen_incl : t ‑> t ‑> t Quickcheck.Generator.t

gen_incl d1 d2 generates dates in the range between d1 and d2, inclusive, with the endpoints having higher weight than the rest. Raises if d1 > d2.

val gen_uniform_incl : t ‑> t ‑> t Quickcheck.Generator.t

gen_uniform_incl d1 d2 generates dates chosen uniformly in the range between d1 and d2, inclusive. Raises if d1 > d2.

module Days : sig ... end with type date := t

Days provides a linear representation of dates that is optimized for arithmetic on the number of days between dates, rather than for representing year/month/day components. This module is intended for use only in performance-sensitive contexts where dates are manipulated more often than they are constructed or deconstructed; most clients should use the ordinary t.

module Stable : sig ... end
module O : sig ... end
val of_time : Core_kernel__.Time_float.t ‑> zone:Core_kernel__.Time_float.Zone.t ‑> t
val today : zone:Core_kernel__.Time_float.Zone.t ‑> t