Thank you for contacting us. To get the Indian timezones you need to download an additional package from AlexT’s repo. First, follow these instructions to setup fetching packages from the repo http://alextgalileo.altervista.org/edison-package-repo-configuration-instructions.html . Run opkg update to communicate with the repo. Then, you should download the package that includes the Asian timezones. To download and install it type “opkg install tzdata-asia”. After this, you should see an “Indian” folder inside /usr/share/zoneinfo directory. There you can see the different options for Indian timezones. When you decide which timezone you wish to configure on your Edison simply change the /etc/timezone file to include this new time zone.
Save and quit.
Then, run the command export TZ=Indian/<your_timezone>
Let us know if this works for you.
Thanks for your support Sergio.