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Editorial Team
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Asked: 2026-06-11T05:20:28+00:00

I have a spreadsheet full of data with dates that look like this: Mon

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I have a spreadsheet full of data with dates that look like this:

   Mon Jul 16 15:20:22 +0000 2012

Is there a way to convert these to R dates (preferably PST) without using regular expression or is there no other way? I’d appreciate ideas on doing this conversion efficiently.

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1 Answer

  1. Editorial Team

    Sure, just use strptime() to parse time from strings:

    R> strptime("Mon Jul 16 15:20:22 +0000 2012", 
+           format="%a %b %d %H:%M:%S %z %Y")
[1] "2012-07-16 10:20:22 CDT"
R>

    which uses my local timezone (CDT). If yours is Pacific, you can set it explicitly as in 

    R> strptime("Mon Jul 16 15:20:22 +0000 2012", 
+           format="%a %b %d %H:%M:%S %z %Y", tz="America/Los_Angeles")
[1] "2012-07-16 08:20:22 PDT"
R>

    which looks right with a 7 hour delta to UTC.

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