better
DATE_FORMAT_LONG="d-B-Y H:M"
DATE_FORMAT_NORMAL="d-m-Y"
DATE_FORMAT_NICE="a-d-m-Y"
DATE_FORMAT_NICE_SHORT="d-m"

Helped myself!
In file language/your_language.com_booking.ini
replace
DATE_FORMAT_LONG="%d %B %Y %H:%M"
DATE_FORMAT_NORMAL="%d %B %Y"
DATE_FORMAT_NICE="%a %d %b %Y"
DATE_FORMAT_NICE_SHORT="%d %b"

for a

DATE_FORMAT_LONG="d-m-Y H:i"
DATE_FORMAT_NORMAL="d-m-Y"
DATE_FORMAT_NICE="a-d-m-Y"
DATE_FORMAT_NICE_SHORT="d-m"

and all get work!

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Answers in forum don't help me.
Please HELP!!