Other test case for Bangladesh:
Wrong in Jaunty (2009n):
$ TZ=Asia/Dhaka date -d 20100401 Thu Apr 1 00:00:00 BDT 2010
Correct in Karmic (2009o):
$ LANG= TZ=Asia/Dhaka date -d 20100401 Thu Apr 1 00:00:00 BDST 2010
(Bangladesh keeping DST)
Other test case for Bangladesh:
Wrong in Jaunty (2009n):
$ TZ=Asia/Dhaka date -d 20100401
Thu Apr 1 00:00:00 BDT 2010
Correct in Karmic (2009o):
$ LANG= TZ=Asia/Dhaka date -d 20100401
Thu Apr 1 00:00:00 BDST 2010
(Bangladesh keeping DST)