Hello,
I have Joomla 3.4.5 and Matukio 5.2.7 installed.
I try to edit an event but I get this:

An error has occurred.
0 DateTime::__construct(): Failed to parse time string (Valid from) at position 0 (V): The timezone could not be found in the database

This happens both front and backend. I guess some small fix in some php file would solve this, but which one?
Br,
Miika