When you ask someone what time is it, you normally don't have to second guess them. But when it comes to asking Google, Yahoo, Bing or Ask.com what time is it, you have to second guess them.
If you search [bangladesh time] at the four search engines, you will have Google and Yahoo telling you one time, while Bing.com and Ask.com telling you a different time. Who do you believe?
Google & Yahoo:
Bing & Ask.com:
So who is right?
Forum discussion at Google Web Search Help.