To print the current time in the specified zone 

$ zdump india

$ zdump Japan

$ zdump Asia/Kolkata

To print verbose output

$ zdump -v india

To print help options

$ zdump --help

To print verbose time zone information for zones with verbose output stopping near the start of the year 2030

$ zdump -v -c 2030 japan

$ zdump -v -c 2030 india

regards,

T.Dhanasekar