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Full Discussion: Problem with Timestamp
Top Forums Shell Programming and Scripting Problem with Timestamp Post 302929671 by RudiC on Wednesday 24th of December 2014 05:39:11 AM
Old 12-24-2014
And what about calling this on a month's first short after midnight? Or on 1. Jan ?
If you have bash and GNU date, try
Code:
printf "%(%F %T)T\n"  $(($(date -d "2014-12-22 05:15:13"  +"%s") - 3600))
2014-12-22 04:15:13

On (Free)BSD, try
Code:
date -jv-1H -f "%F %T" "2014-12-22 05:15:13.13423" +"%F %T"
Warning: Ignoring 6 extraneous characters in date string (.13423)
2014-12-22 04:15:13

In either case, you lose the split seconds...
 

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sttime(3)						    ShapeTools Toolkit Library							 sttime(3)

NAME
stMktime, stWriteTime - date and time handling SYNOPSIS
#include <config.h> #include <sttk.h.h> time_tstMktime (char *string); char*stWriteTime (time_t date); DESCRIPTION
stMktime scans the given string and tries to read a date and time from it. It understands various formats of date strings. The following is a list of all valid formats, optional parts in brackets. [Tue] Jan 5[,] [19]93 This includes the standard asctime(3) format. Jan 5 With no year given, the year defaults to the current year. [19]93/01/05 This notation requires month and day represented by exactly two digits. 5.1.[19]93 This is the usual German notation. 5.1. German notation referencing the current year. A certain time, given together with the date must always have the following form. hours:minutes[:seconds] Each of the fields must be an integer value within the proper range (hours: 0-23, minutes and seconds: 0-59). Values below 10 may be written as one digit numbers. The time value may be placed anywhere in the date string: at the beginning, at the end, or somewhere in the middle. Any amount of white- space may be given between a field of the time value and the separating colon. The time is always considered to be local time. stWriteTime generates a time string similar to asctime(3) from its date argument. SEE ALSO
asctime(3) BUGS
Time Zone Names within the time string (like `MET') are not handled properly. In most cases they will cause a failure. sttk-1.7 Thu Jun 24 17:43:35 1993 sttime(3)
All times are GMT -4. The time now is 04:17 AM.
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