manipulating_date_strings
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manipulating_date_strings [2011/11/20 10:48] – juckins | manipulating_date_strings [2022/05/07 12:33] (current) – juckins | ||
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[cjuckins@lnxopc2: | [cjuckins@lnxopc2: | ||
America/ | America/ | ||
+ | </ | ||
+ | |||
+ | Manipulating date/time from NWS text products: | ||
+ | < | ||
+ | If you take the date/time line from a current text product, such as: | ||
+ | |||
+ | 806 PM EST TUE 3 JAN 2012 | ||
+ | |||
+ | Add a colon to the hour/ | ||
+ | |||
+ | 8:06 PM EST TUE 3 JAN 2012 | ||
+ | |||
+ | You can feed that string directly into the linux date command and | ||
+ | manipulate it forward and backward by any amount of time and then print | ||
+ | it out in the same format. | ||
+ | |||
+ | Forward 6 hours: | ||
+ | $ date --date=" | ||
+ | %Y" | sed ' | ||
+ | 206 AM EST WED 4 JAN 2012 | ||
+ | |||
+ | Forward 30 minutes: | ||
+ | date --date=" | ||
+ | %b %Y" | sed ' | ||
+ | 836 PM EST TUE 3 JAN 2012 | ||
+ | |||
+ | Backward 12 hours: | ||
+ | date --date=" | ||
+ | %Y" | sed ' | ||
+ | 806 AM EST TUE 3 JAN 2012 | ||
+ | |||
+ | The 1st sed strips any leading zeros at the beginning of the line, the | ||
+ | 2nd sed strips any other leading zeros, and the final sed makes it all | ||
+ | UPPER. | ||
</ | </ | ||
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[juckins@lightning: | [juckins@lightning: | ||
Sat Nov 19 16:59:00 EST 2011 | Sat Nov 19 16:59:00 EST 2011 | ||
+ | |||
+ | $date --date=" | ||
+ | 121002/0800 | ||
+ | |||
+ | $ date --date=" | ||
+ | 121003/1800 | ||
+ | |||
+ | $ date --date=" | ||
+ | 121002/1200 | ||
+ | |||
+ | $ date -d @1446390000 | ||
+ | Sun Nov 1 15:00:00 UTC 2015 | ||
</ | </ | ||
+ | |||
+ | Converting from seconds and a different timezone: | ||
+ | TZ=": | ||
+ | TZ=": | ||
+ | TZ=": |
manipulating_date_strings.1321804102.txt.gz · Last modified: 2011/11/20 10:48 by juckins