<div dir="ltr"><div><div><div><div> Dear IANA TZ,<br><br></div> Since the last time change Chile has been in GMT-3 (i.e. Chile is right now in GMT-3).<br><br> Chile is going to GMT-4 in May,14th midnight and returning to GMT-3 in August, 13th midnight.<br> That means clocks will go back 1 hour at 00:00 May 15th (jumping back
to May 14th); and will go forward by 1 hour on 00:00, August 14th.<br></div><br></div> In tzdata2016c I can see this new rules for Chile:<br><span style="font-family:monospace,monospace"># Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S<br>Rule Chile 2016 max - May Sun>=9 3:00u 0 -<br>Rule Chile 2016 max - Aug Sun>=9 4:00u 1:00 S</span><br><br></div> And I can see this Chile zone definition:<br><span style="font-family:monospace,monospace"># Zone NAME GMTOFF RULES FORMAT [UNTIL]<br>Zone America/Santiago -4:42:46 - LMT 1890<br> -4:42:46 - SMT 1910 Jan 10 # Santiago Mean Time<br> -5:00 - CLT 1916 Jul 1 # Chile Time<br> -4:42:46 - SMT 1918 Sep 10<br> -4:00 - CLT 1919 Jul 1<br> -4:42:46 - SMT 1927 Sep 1<br> -5:00 Chile CL%sT 1932 Sep 1<br> -4:00 - CLT 1942 Jun 1<br> -5:00 - CLT 1942 Aug 1<br> -4:00 - CLT 1946 Jul 15<br> -4:00 1:00 CLST 1946 Sep 1 # central Chile<br> -4:00 - CLT 1947 Apr 1<br> -5:00 - CLT 1947 May 21 23:00<br> -4:00 Chile CL%sT<br></span><br><div> But with these two information I'm not sure that in the midnight of May, 14th this tzdata2016c will change the TZ of Chile from GMT-3 to GMT-4.<br><br></div><div> Can you please explain me how these structures in tzdata2016c work to accomplish the necessary TZ change in Chile.<br><br></div><div><br> Thank you very much, best regards.<br><br></div><div> Luis<br><br></div><div><br></div></div>