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ANSI Common Lisp  25 Environment 25.1 The External Environment 25.1.4 Time
25.1.4.1 Decoded Time
A decoded time is an ordered series of nine values that, taken together,
represent a point in calendar time (ignoring leap seconds):
- Second
An integer between 0 and 59, inclusive.
- Minute
An integer between 0 and 59, inclusive.
- Hour
An integer between 0 and 23, inclusive.
- Date
An integer between 1 and 31, inclusive (the upper limit actually
depends on the month and year, of course).
- Month
An integer between 1 and 12, inclusive;
1 means January, 2 means February, and so on; 12 means December.
- Year
An integer indicating the year A.D. However, if this
integer
is between 0 and 99, the "obvious" year is used; more precisely,
that year is assumed that is equal to the
integer modulo 100 and
within fifty years of the current year (inclusive backwards
and exclusive forwards).
Thus, in the year 1978, year 28 is 1928
but year 27 is 2027. (Functions that return time in this format always return
a full year number.)
- Day of week
An integer between 0 and 6, inclusive;
0 means Monday, 1 means Tuesday, and so on; 6 means Sunday.
- Daylight saving time flag
A generalized boolean that,
if true, indicates that daylight saving time is in effect.
- Time zone
A time zone.
The next figure shows defined names relating to decoded time.
Defined names involving time in Decoded Time.
| decode-universal-time |
get-decoded-time |
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