@node Date input formats
@chapter Date input formats
-@c Copyright 1994, 1995, 1996, 1997, 1999, 2000, 2001 Free Software
-@c Foundation, Inc.
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-@c Permission is granted to copy, distribute and/or modify this document
-@c under the terms of the GNU Free Documentation License, Version 1.1
-@c or any later version published by the Free Software Foundation;
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-@c Front-Cover Texts, and with no Back-Cover Texts.
-@c A copy of the license is included in the section entitled ``GNU
-@c Free Documentation License''.
-
@cindex date input formats
@findex getdate
arguments to the various programs. The C interface (via the
@code{getdate} function) is not described here.
-@cindex beginning of time, for @sc{posix}
-@cindex epoch, for @sc{posix}
+@cindex beginning of time, for @acronym{POSIX}
+@cindex epoch, for @acronym{POSIX}
Although the date syntax here can represent any possible time since the
year zero, computer integers often cannot represent such a wide range of
-time. On @sc{posix} systems, the clock starts at 1970-01-01 00:00:00
-@sc{utc}: @sc{posix} does not require support for times before the
-@sc{posix} Epoch and times far in the future. Traditional Unix systems
+time. On @acronym{POSIX} systems, the clock starts at 1970-01-01 00:00:00
+@sc{utc}: @acronym{POSIX} does not require support for times before the
+@acronym{POSIX} Epoch and times far in the future. Traditional Unix systems
have 32-bit signed @code{time_t} and can represent times from 1901-12-13
20:45:52 through 2038-01-19 03:14:07 @sc{utc}. Systems with 64-bit
signed @code{time_t} can represent all the times in the known