Date Format / Birth Date Seems Invalid!

Hey friends.

Any help would be appreciated. On some browsers and some computers, I keep getting this error for the date format. I’m trying to get it fixed for the client. The form cannot be submitted even when the date is inserted correctly.

http://cl.ly/image/2t2w3r3I3x0p

Please, any information is appreciated. Thank you!

Angel

https://ww.wp.xz.cn/plugins/contact-form-7/