Class | Package: util.date-time | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 9.0 Unrevised from 8.2 to 9.0. 8.2 version

## date-time

The class of a `date-time` object. date-time instances are created with the function date-time. The function merge-date-times also can create `date-time` objects. The values in the slots of a date-time object are immutable. The slot readers for the `date-time` class are:

- date-time-ymd-yd-before-year-0: a boolean, true if the Calendar date is before the year 0. (See also date-time-ywd-before-year-0. Note that these functions may return different values for some days around January 1, year 0.)
- date-time-ymd-yd-century
- date-time-ymd-yd-year-in-century
- date-time-ymd-month
- date-time-ymd-day
- date-time-yd-day
- date-time-ywd-before-year-0: a boolean, true if the Week date is before the year 0. (See also date-time-ymd-yd-before-year-0. Note that these functions may return different values for some days around January 1, year 0.)
- date-time-ywd-century: an integer specifying the Week date century.
- date-time-ywd-decade-in-century: an integer specifying the Week date decade in the century.
- date-time-ywd-year-in-decade: the Week date year in the decade.
- date-time-ywd-week: an integer between 1 and 53, inclusive.
- date-time-ywd-day: an integer from 1 (Monday) to 7 (Sunday).
- date-time-hour: an integer specifying the hour.
- date-time-hourf: a rational specfying the hour and fraction of an hour.
- date-time-minute: an integer specifying the minute.
- date-time-minutef: a rational specfying the minute and fraction of a minute.
- date-time-second: an integer specifying the second.
- date-time-secondf: a rational specfying the second and fraction of a second.
- date-time-zone-hour: an integer.
- date-time-zone-minute: an integer.

See also the functions decode-date-time, date-time-year, and date-time-zone and the classes `duration` and `time-interval`.

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

Copyright (c) 1998-2019, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.2 page.
Created 2012.5.30.

|  | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 9.0 Unrevised from 8.2 to 9.0. 8.2 version