Bangladesh introduces DST for the first time, setting the clocks head for an hour from 11 PM, June 19, 2009.
Timezone should therefor be changed to GMT +7 from current GMT +6 for Asia/Dhaka from above mentioned date.
It is however undecided how long this will be in effect, but estimated to be till September 30, 2009, just before the winter.
The Daily Star: http://tr.im/nmH9
Asian Tribune: http://tr.im/nmGS
Hmm, a second duplicate, this indeed looks like a hot issue.
*** This bug has been marked as a duplicate of bug 503832 ***
Sorry, didn't realise that this was a duplicate.