public static Date fromJson(String jsonText) {
        return FORMATTER.parseDateTime(jsonText).toDate();
    }
Contains Jackson module for serializing dates to ISO8601 format per the <a href="https://states-language.net/spec.html#timestamps">spec</a>.
aws-java-sdk-stepfunctions/src/main/java/com/amazonaws/services/stepfunctions/builder/internal/DateModule.java