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Diffstat (limited to 'lispref/os.texi')
| -rw-r--r-- | lispref/os.texi | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lispref/os.texi b/lispref/os.texi index e231a0937ad..3c7e46518f3 100644 --- a/lispref/os.texi +++ b/lispref/os.texi @@ -907,6 +907,18 @@ convert calendrical information to a time value. You can get time values from the functions @code{current-time} (@pxref{Time of Day}) and @code{file-attributes} (@pxref{File Attributes}). +Many operating systems are limited to time values that contain 32 bits +of information; these systems typically handle only the times from +1901-12-13 20:45:52 UTC through 2038-01-19 03:14:07 UTC. However, some +operating systems have larger time values, and can represent times far +in the past or future. + +Time conversion functions always use the Gregorian calendar, even for +dates before the Gregorian calendar was introduced. Year numbers count +the number of years since the year 1 B.C., and do not skip zero as +traditional Gregorian years do; for example, the year number -37 +represents the Gregorian year 38 B.C@. + @defun format-time-string format-string time This function converts @var{time} to a string according to @var{format-string}. The argument @var{format-string} may contain |