Regular Expression: ISO8601 Date Time Format

The ISO 8601 specification allows a wide variety of date time formats. Here are two versions of the RegExp for ISO8601 date time format. This first checks if the string is a valid ISO 8601 date string. The other one for a full date string including the hours/minutes/seconds (Commonly used in API’s).

They can be used to check string contains an ISO 8601 date string or validate the date time string after converted from the Date object.

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