Currently, tz database say Mongolia use UTC+7/8/9 as timezone. However, after quick google search, I found a question about time of Mongolia in a Mongolia question and answer time at [1]. The page itself is facing technical problem to me so I accessed it via Google cache which I subsequently thrown the cache into Google translate and archived the result at [2]. According to the page from 2016, three different users of the site answered the question with same answer, and all of them are saying Mongolia have three different timezone: 6, 7, 8. This is different from the information recorded in tz database. So, is the information in tz database incorrect? And then, another question on the site [3] (archived in [4]) asked about when did Mongolia start officially using the world time and someone answered since 1997. What does that mean? (On the other hand, another answer to a similar question say 1961... [5][6] or is that an error in machine translation?) [1]: http://acyy.mn/3379/монгол-улс-хэд-хэддүгээр-цагын-бүсэд-оршдог-вэ [2]: http://archive.is/y3jpH [3]: http://acyy.mn/8620/монгол-хэдэн-оноос-дэлхийн-бүсийн-цагийг-хэрэглэж-эхлэсэн [4]: http://archive.is/PQBVk [5]: http://acyy.mn/7379/му-хэдэн-оноос-дэлхийн-цагийг-баримтлах-болсон-бэ [6]: http://archive.is/e39nW