Update time zone data files to tzdata release 2026e. Canada's Northwest Territories will move to permanent UTC-06 on 2026-11-01. For now, assume their TZ abbreviation will be CST from that time forward. This affects only America/Inuvik as the rest of the territory is covered by America/Edmonton, for which the equivalent change was released in 2026c.
Manitoba (America/Winnipeg) will move to permanent UTC-05 on 2026-10-31. For now, assume their TZ abbreviation will be EST from that time forward. (Upstream notes that more changes may be needed soon if smaller jurisdictions choose to break away from what these have done, but for now the plan is wait-and-see.) Historical corrections for Colombia, Iran, and Ireland. The backward-compatibility zone names EST5EDT, CST6CDT, MST7MDT, and PST8PDT now conform better to POSIX. For example, EST5EDT now always uses the abbreviation "EST" for standard time (now always 5 hours behind UTC) and "EDT" for daylight saving time, whereas it formerly had different UT offsets before standard time was introduced and sometimes used abbreviations like "LMT", "EWT" and "EPT", all contrary to POSIX. Also, though not specified by POSIX these names now use US federal rules rather than rules of specific places like New York, reverting to 2024a behavior. This change affects only timestamps before 1966-10-30 at 01:00 standard time. Backpatch-through: 14 Branch ------ REL_19_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/9e73b2095f5f9c74be0be4f62450e1503762129a Modified Files -------------- src/timezone/data/tzdata.zi | 55 ++++++++++++++++++++++++++++++--------------- 1 file changed, 37 insertions(+), 18 deletions(-)
