Asterisk displays wrong time

It has been reported, when system moves to another time (summer <-> winter) asterisk still using old time, even when time is changed in system itself. Solution: make sure you have a right time running, by copying correct zoneinfo file from /usr/share/zoneinfo/ to /etc/localtime and then reboot your machine when you don't have any active calls (you can check any active calls by entering 'rasterisk' and then typing 'core show channels').