April 12, 2013
5:38 a.m.
On Fri, Apr 12, 2013, at 4:45, Tobias Conradi wrote:
Your own table shows that the abbreviations letters can mean different things. D for %s never means anything else than 1:00 saving. HD and HS for %s always mean less than 1:00 saving and DD and DS always mean 2:00 saving.
So, you introduce a new meaning for D for %s.
There is no rule that a specific string always means a specific time offset. The rule is supposed to be to use what is used locally. For example, New Zealand before 1945 uses NZMT/NZST for 0:30 saving. European rules use "M" for "midsummer" 2:00 saving time of the 1940s even though other rules use it for "mean" time. You are inferring a systematism where non exists.