To validate the date field you could use incubator project CB Redirect and check the date fields value with REGEX condition using the BEFORE registration trigger. If failed you can redirect them back to registration with an error message.

For the name fields you could configure within CB configuration on the General tab the display to be First and Last name display then ensure the fields are set as Required in Field Management, this would force the user to complete them.

Your user group is not valid, folks when using an incubator project directly to the right of every parameter is a description of its usage. Please read the information carefully. You must select all usergroups to include in the check, Public or Users is not a valid group. If you want it to function for registered users for example set it to Registered.

Have confirmed though that access to public users is NULL and that the plugin does not allow selecting "Everybody". Please wait for next release to use the on BEFORE triggers.

For the name fields , My clients wants all in one field. he wants only one field and force user to write tree words for name and first and second surname. this can be ?

Then within CB configuration set the name format to a single name field. There's no reason to modify the contents or anything of the sort. Then within the name field edit the validation to PERL Regular Expression and provide REGEX to ensure is 3 words.