(defn valid-yyyymmdd?
  [date]
  ;; Here's the code that you would use in Java, but using Clojure interop, 
which needs to return true/false if valid.
  ;; So an example:
  (try (let [format (java.time.format.DateTimeFormatter/ofPattern 
"yyyyMMdd")]
         (java.time.LocalDate/parse date format)
         true)
       (catch java.time.format.DateTimeParseException e
         false)))

(s/def ::yyyymmdd valid-yyyymmdd?)

Now ::yyyymmdd is a spec for strings that formats as yyyyMMdd.

On Monday, 12 March 2018 19:04:43 UTC-7, bijay paudel wrote:
>
> Any idea how can I use in Clojure spec?
>
> Thanks!
> Bijay
>
> On Mon, Mar 12, 2018 at 9:02 PM, Didier <did...@gmail.com <javascript:>> 
> wrote:
>
>> Do it as you would in Java, using Clojure/Java interop.
>>
>> If you paste the Java code for how you'd do it, we can help you convert 
>> it to Clojure interop code.
>>
>>
>> On Monday, 12 March 2018 15:28:27 UTC-7, pbi...@gmail.com wrote:
>>>
>>> I am java certified professional.Currently  I am working  Clojure I am 
>>> still learning clojure.
>>> I am trying to validate date ( YYYYMMDD) using clojure. Any one have 
>>> idea how can I validate?
>>>
>>> Thanks!
>>> Bijay
>>>
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