Hello! Time zone: Used: Asia/Tomsk | Config: Undefined | Environment (TZ): Undefined Why "Undefined"? Is it just me? https://wiki.koha-community.org/wiki/Time_Zone_Configuration If set <timezone>Asia/Tomsk</timezone> to koha-conf.xml and restart koha-common, then on the page cgi-bin/koha/about.pl http error 500 (Internal Server Error). root@koha:~# mysql -uroot -p -e "SHOW VARIABLES LIKE '%time_zone%';" Enter password: +------------------+--------+ | Variable_name | Value | +------------------+--------+ | system_time_zone | +07 | | time_zone | SYSTEM | +------------------+--------+ root@koha:~# mysql -uroot -p -e "select current_timestamp();" Enter password: +---------------------+ | current_timestamp() | +---------------------+ | 2023-06-08 16:48:10 | +---------------------+ The date and time are correct. Koha 23.05 https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=33936 Good Luck! Igor A. Sychev Tomsk Polytechnic University https://lib.tpu.ru