On 2/1/19 1:01 PM, Lev wrote: > For Europe/Budapest, I got this tz string: > > CET-1CEST,M3.5.0,M10.5.0/3 > > I think IMHO it should be: > > CET-1CEST,M3.5.0/2,M10.5.0/3 They're equivalent POSIX TZ strings, and the one zic uses is shorter. See: http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_03