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Here's a simple Regex to find dates in different formats:
[0-3]?[0-9]/[0-3]?[0-9]/(?:[0-9]{2})?[0-9]{2}
So if we have a text file like this one:
. . . and we run the Regex search this way in PowerGrep
We get these results:
Thanks to Lokesh Gupta for posting this regular expression at http://howtodoinjava.com/regex/java-regex-date-format-validation/