Currently we install just zone.tab, but it says:
```
# This file is intended as a backward-compatibility aid for older programs.
# New programs should use zone1970.tab. This file is like zone1970.tab (see
# zone1970.tab's comments), but with the following additional restrictions:
#
# 1. This file contains only ASCII characters.
# 2. The first data column contains exactly one country code.
#
# Because of (2), each row stands for an area that is the intersection
# of a region identified by a country code and of a timezone where civil
# clocks have agreed since 1970; this is a narrower definition than
# that of zone1970.tab.
```
I understand that zone.tab is still used by eg tzsetup and that's why it's installed (eventually I guess that such tools should change considering messages like [1]), but is there some reason not to install both, for other software that wants to use the newer file now?
[1] http://mm.icann.org/pipermail/tz/2014-October/021760.html