Help with RegExp for Date

-- HikaShop version -- : HikaShop Business: 2.6.1
-- Joomla version -- : Joomla! 3.4.8
-- PHP version -- : 5.5.10
-- Browser(s) name and version -- : Chrome

I've created a custom text field for a date (format: dd/mm/yyyy) and trying to write
a regexp to catch those that don't match. Not sure how it should be formatted
within the custom field screen. The field is required, so regexp should be checked.


Thanks

I tried that, but it doesn't recognize the string as valid. I see that its expecting
dd/dd/dddd (d=digit/number). Images shows the error appear when a valid string
is entered and the backend setup of the field (with the regexp).

I'm confused!

Got it fixed.

Drop the / .... /

as part of the expression.

Thanks