Module type Zone.S

The type of a time-zone.

bin_io and sexp representations of Zone.t are the name of the zone, and not the full data that is read from disk when Zone.find is called. The full Zone.t is reconstructed on the receiving/reading side by reloading the zone file from disk. Any zone name that is accepted by find is acceptable in the bin_io and sexp representations.

input_tz_file ~zonename ~filename read in filename and return t with name t = zonename

likely_machine_zones is a list of zone names that will be searched first when trying to determine the machine zone of a box. Setting this to a likely set of zones for your application will speed the very first use of the local timezone.

of_utc_offset offset returns a timezone with a static UTC offset (given in hours).

utc the UTC time zone. Included for convenience

original_filename t return the filename t was loaded from (if any)

digest t return the MD5 digest of the file the t was created from (if any)

For performance testing only; reset_transition_cache t resets an internal cache in t used to speed up repeated lookups of the same clock shift transition.

A time zone index refers to a range of times delimited by DST transitions at one or both ends. Every time belongs to exactly one such range. The times of DST transitions themselves belong to the range for which they are the lower bound.

Gets the index of a time.

Gets the UTC offset of times in a specific range.

This can raise if you use an Index.t that is out of bounds for this t.

index_abbreviation_exn t index returns the abbreviation name (such as EDT, EST, JST) of given zone t for the range of index. This string conversion is one-way only, and cannot reliably be turned back into a t. This function reads and writes the zone's cached index. Raises if index is out of bounds for t.

Accessors for the DST transitions delimiting the start and end of a range, if any. The _exn accessors raise if there is no such transition. These accessors are split up to increase performance and improve allocation; they are intended as a low-level back-end for commonly-used time conversion functions. See Time.Zone and Time_ns.Zone for higher-level accessors that return an optional tuple for clock shifts in either direction.