Thanks very much for all that work. I found only a couple of typos. First, the line beginning with "2000 Temporary Provisions" should end with 2000-10-06 not 2000-09-06. Second, citation 3 should be https://findit.library.yale.edu/images_layout/view?parentoid=15537491&increm... instead of the same URL ending in "=958". I ran into several ambiguities, where a transition at “midnight” might have been at 00:00 or 24:00, and might have been at standard time or daylight saving time. When resolving these ambiguities, I attempted to minimize the changes from existing tzdb. Most likely some errors remain, but still we should be better off than we were before. I installed the attached proposed patch to implement this. It reformats your file to fit into 80 columns when included as a comment. There are so many changes I didn't detail them all in NEWS, and I removed similar detail from Kenya news to be consistent. To give people a feel for the timestamp changes involved, I am also attaching the output of "diff -U4 to2050.tzs to2050new.tzs". This lists all changed timestamps. The columns are date, hour of day, UTC offset, abbreviation, and tm_isdst flag, with all columns (including hour) being in effect just *after* the transition.