On 05/04/2018 07:52 AM, J William Piggott wrote:

On 05/03/2018 08:22 PM, Paul Eggert wrote:

8< ...

...

; effectively the main format now uses vanguard instead of rearguard format. 8< ...

...

The full effect of this change is only in vanguard format; in rearguard and main format, the tm_isdst flag is still zero in winter and nonzero in summer. ...

Aren't these to statements contradictory?

Yes they are, and that typo wasn't fixed until after the 2018e release was cut. You can see a copy of the fix here: https://mm.icann.org/pipermail/tz/2018-May/026447.html