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Top Forums Shell Programming and Scripting Convert Timestamp in text to Serial Date-Time Post 303013089 by Chubler_XL on Wednesday 14th of February 2018 05:40:33 PM
Old 02-14-2018
Quote:
Originally Posted by AshBax
many thanks
will speak with them.

---------- Post updated at 03:23 PM ---------- Previous update was at 01:57 PM ----------

i have code that converts from the data format mentioned into epoch.

Code:
 awk -F, '{"date +%s -d\""$1 "\""| getline dte;$1=dte}1' OFS="-500," databars_example_2.csv > databars_example_222.csv

now i just need to change epoch into serial data..... any thoughts?
If date is already adjusting correctly for your required timezone then try this:

Code:
awk -F\, '{
  secs=$1
  sub(/[+-].*/, "", secs)
  sub(/.*[.]/,"0.", secs)

  "date +%s -d\""$1"\"" | getline datespec

  UnixTime = datespec + secs
  Excel = (UnixTime / 86400) + 25569 
  printf "%0.20f\n", Excel
}' databars_example_2.csv

Otherwise calculating timezone adjust in awk:

Code:
awk -F, '{
  
  secs=$1
  sub(/[+-].*/, "", secs)
  sub(/.*[.]/,"0.", secs)

  tz = $1
  sub(/.*[+]/,"",tz)
  sub(/.*[-]/,"-",tz)
  tzadj = int(tz / 100) * 3600 + (tz % 100) * 60

  tstamp = $1
  gsub(/[-+][0-9]*$/,"",tstamp)

  "date -u +%s -d\""tstamp"\"" | getline datespec

  UnixTime = datespec + secs + tzadj
  Excel = (UnixTime / 86400) + 25569
  printf "%0.20f\n", Excel
}' databars_example_2.csv

This User Gave Thanks to Chubler_XL For This Post:
 

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GMDATE(3)								 1								 GMDATE(3)

gmdate - Format a GMT/UTC date/time

SYNOPSIS
string gmdate (string $format, [int $timestamp = time()]) DESCRIPTION
Identical to the date(3) function except that the time returned is Greenwich Mean Time (GMT). PARAMETERS
o $format - The format of the outputted date string. See the formatting options for the date(3) function. o $timestamp - The optional $timestamp parameter is an integer Unix timestamp that defaults to the current local time if a $timestamp is not given. In other words, it defaults to the value of time(3). RETURN VALUES
Returns a formatted date string. If a non-numeric value is used for $timestamp, FALSE is returned and an E_WARNING level error is emitted. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.1.0 | | | | | | | The valid range of a timestamp is typically from | | | Fri, 13 Dec 1901 20:45:54 GMT to Tue, 19 Jan 2038 | | | 03:14:07 GMT. (These are the dates that corre- | | | spond to the minimum and maximum values for a | | | 32-bit signed integer). However, before PHP 5.1.0 | | | this range was limited from 01-01-1970 to | | | 19-01-2038 on some systems (e.g. Windows). | | | | | 5.1.1 | | | | | | | There are useful constants of standard date/time | | | formats that can be used to specify the $format | | | parameter. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 gmdate(3) example When run in Finland (GMT +0200), the first line below prints "Jan 01 1998 00:00:00", while the second prints "Dec 31 1997 22:00:00". <?php echo date("M d Y H:i:s", mktime(0, 0, 0, 1, 1, 1998)); echo gmdate("M d Y H:i:s", mktime(0, 0, 0, 1, 1, 1998)); ?> SEE ALSO
date(3), mktime(3), gmmktime(3), strftime(3). PHP Documentation Group GMDATE(3)
All times are GMT -4. The time now is 01:55 AM.
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