INVALID DATE IN VM3

[NETsystem.tv]

Hello. Using Joomla 3, VM3, Italian Language ... The system ask me to confirm the order for purchase, however, it does not conclude, though stops and the message appears at the top center "wrong date" = invalid dates or wrong dates ... Using VM for years and have never seen this kind of error message, no idea or solution to the problem ... because ?, thank you, sincerely, René

[GJC Web Design]

live URL?

[NETsystem.tv]

If the site is online, but precisely because of that problem right now I have it offline ... Attached is a picture of the problem, where you can see the error, I marked in red, thanks, greetings from Italy ...

[GJC Web Design]

have you searched for Data Errata in the VM It lang files so then you can search for the lang contant and then for that constant in the VM files

But have never seen this.. sure its not some 3rd party thing?