BTT in relation with the bordering nations.
Bhutan Time (BTT) is the time zone of Bhutan. It is six hours ahead of UTC (UTC+06:00). Bhutan does not observe Daylight saving time.
IANA time zone database
The IANA time zone database contains one zone for Bhutan in the file zone.tab, which is named Asia/Thimphu.
- ^ Ibp Inc (2 September 2013). Bhutan Business Intelligence Report Volume 1 Practical Information and Opportunities. Int'l Business Publications. p. 13. ISBN 978-0-7397-4922-7.