Orage fails to recognize some zone names

Orage does not support following timezones:

1. "FLE Standard Time", log message: (orage:91552): orage-CRITICAL **: 11:09:48.883: ic_convert_to_timezone: builtin timezone FLE Standard Time not found, conversion failed.
2. "Asia/Calcutta", log message: orage-INFO: 15:37:07.907: ic_convert_to_timezone: builtin timezone 'Asia/Calcutta' not found, conversion failed