For the curious, this is one way to parse the date.

TZ=UTC perl -MDate::Manip=UnixDate -e '
$_=q{[2009/Mar/26:12:12:48 -0500]};
s/:/ /;
tr/[]//d;
print UnixDate($_,"%Y-%m-%d %H:%M:%S");'
2009-03-26 17:12:48
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