[TYPO3-project-seminars] Birth-Date in E-Mail to the Organizer always 01.01.1970

[Christian]

Hello,

I am successfully running the seminars extension but there is one  
problem that I couldn't fix.
When the user enters his Birth Date in the FE it gets correctly  
written to the DB and it is also correct if you check it in the BE.

But in the E-Mail to the Organizer the date is always 01.01.1970.
Did I configure something wrong or is this a bug in the seminars  
extension?

Thanks for your time.

Greets,
Chris