Bug#37487: timezones should not exist any more in potato
First a problem:
libc6 replaces timezones, which should therefore not be among the Available
Required packages in section base.
Now the bug:
After upgrading (God bless me...) to libc 2.1.1, which removed timezones, I
purged timezones. Unfortunately, it removed some files in /etc, I believe
/etc/timezones, so I had to reset my time zone using tzconfig. It was
good, because I discovered a bug (filed already) in tzconfig, but timezones
should behave more sanely.