/usr/bin/zdump: usage: /usr/bin/zdump OPTIONS TIMEZONE ...
Options include:
  -c [L,]U   Start at year L (default -500), end before year U (default 2500)
  -t [L,]U   Start at time L, end before time U (in seconds since 1970)
  -i         List transitions briefly (format is experimental)
  -v         List transitions verbosely
  -V         List transitions a bit less verbosely
  --help     Output this help
  --version  Output version info

Report bugs to <https://www.gnu.org/software/libc/bugs.html>.