date-time-yd-day

Arguments: date-time

Returns the value in the yd-day (day in year) slot of date-time, which must be a date-time object. The value is nil if the slot is not set. Otherwise it is an integer from 1 to 366. This value cannot be changed with setf and this function.

(require :datetime)
(use-package :util.date-time)

;; date-time is 1985/04/12 10:15:30, that is 15 and a half
;; minutes after 10 AM April 12, 1985.
(setq a (date-time "1985-04-12T10:15:30"))
(date-time-yd-day a) -> 102 ;; 31+28+31+12 for April 12

See date-time.htm for information on support in Allegro CL for parsing and generating time expressions using the ISO 8601 standard.

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This page was not revised from the 10.0 page.
Created 2019.8.20.