decode-universal-time

decode-universal-time Function

Syntax:

decode-universal-time universal-time &optional time-zone

→ second, minute, hour, date, month, year, day, daylight-p, zone

Arguments and Values:

universal-time—a universal time.

time-zone—a time zone.

second, minute, hour, date, month, year, day, daylight-p, zone—a decoded time.

Description:

Returns the decoded time represented by the given universal time.

If time-zone is not supplied, it defaults to the current time zone adjusted for daylight saving time. If time-zone is supplied, daylight saving time information is ignored. The daylight saving time flag is nil if time-zone is supplied.

Examples:

(decode-universal-time 0 0) → 0, 0, 0, 1, 1, 1900, 0, *false*, 0 
;; The next two examples assume Eastern Daylight Time. 
(decode-universal-time 2414296800 5) → 0, 0, 1, 4, 7, 1976, 6, *false*, 5 
(decode-universal-time 2414293200) → 0, 0, 1, 4, 7, 1976, 6, *true*, 5 
;; This example assumes that the time zone is Eastern Daylight Time 
;; (and that the time zone is constant throughout the example). 
(let\* ((here (nth 8 (multiple-value-list (get-decoded-time)))) ;Time zone 
	(recently (get-universal-time)) 
	(a (nthcdr 7 (multiple-value-list (decode-universal-time recently)))) 
	(b (nthcdr 7 (multiple-value-list (decode-universal-time recently here))))) 
       (list a b (equal a b))) → ((T 5) (NIL 5) NIL) 

Affected By:

Implementation-dependent mechanisms for calculating when or if daylight savings time is in effect for any given session.

See Also:

encode-universal-time, get-universal-time, Section 25.1.4 (Time)

Expanded Reference: decode-universal-time

tip

TODO: Please contribute to this page by adding explanations and examples

(decode-universal-time )