Run this command in terminal
opkg reinstall "$(opkg list zoneinfo* | printf "%s\n" "$(awk '{printf $1" "}')")" && opkg install "$(opkg list zoneinfo* | printf "%s\n" "$(awk '{printf $1" "}')")"
Tell me what the output of running
ls /opt/share/zoneinfo/zone.tab
opkg: unknown sub-command reinstall
ls: /opt/share/zoneinfo/zone.tab: No such file or directory
/tmp/mnt/SanDisk/entware/share/zoneinfo# ls
Asia Europe Hongkong Japan Poland Portugal Singapore