Regular Expression (RegEx) pattern for AWS Cron Expressions
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Regular expression required to match all valid Cron Expressions for AWS Cloudwatch.

Exact requirements are documented here:

Regex is to be used for field validation, and must therefore match ALL valid Cron Expressions as described in the linked documentation, including wildcards. Any invalid Cron Expressions should not be matched.

Regex will be tested against the requirements using to confirm accuracy.

Happy to answer any questions.

Thanks in advance!

Crowdsource coding tasks.

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