3:root@SERVER:/root # cat wtf.shecho datedate echo su - root -c datesu - root -c date3:root@SERVER:/root # 3:root@SERVER:/root # ksh wtf.shdateWed Nov  9 13:15:01 MEZ 2016su - root -c dateWed Nov  9 12:15:01 UTC 20163:root@SERVER:/root # grep TZ /etc/environment    TZ=MEZ-1MESZ-2,M3.5.0/02:00,M10.5.0/03:003:root@SERVER:/root # oslevel -s6100-09-06-15433:root@SERVER:/root # Why do they differ? Even the crontab shows UTC, but the system TZ is MEZ. 
AIX: Why does the timezone differ when using su or in crontab?
date;aix;timezone