Most of BC moves from PDT to Pacific Time on 03-09 · eggert/tz@8b46071

# https://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27-end-of-d-s-1941

# We have no further details, so omit them for now.

# From Arthur David Olson (2026-03-02):

# B. C. Gov News: “Adopting permanent daylight saving time: ‘Spring forward’

# on March 8 will be the last time change, ending twice-yearly clock changes.”

# https://news.gov.bc.ca/releases/2026AG0013-000209

#

# From Paul Eggert (2026-03-03):

# The law specifies a 2026-03-08 02:00 switch from PST to PDT, then 21 hours

# of PDT, then a 2026-03-09 switch to the new standard time Pacific Time,

# i.e., just one clock change but two name changes separated by 21 hours.

#

# PT, the obvious abbreviation for Pacific Time, is one letter too short

# to conform to TZDB’s (and POSIX’s) [-+[:alnum:]]{3,6} requirements.

# I asked the BC government for advice, with no response yet.

# For now, use the abbreviation -07; we can decide later what (if any)

# conforming non-numeric abbreviation to use. Possibilities include:

# MST - the most compatible with existing software and practice,

# and already used in parts of BC and in Yukon

# PDT - almost as software-friendly, but confusing because it implies

# it is DST and is paired with PST, whereas PT is standard time

# PST - straightforward but even more confusing,

# and will likely break much software that assumes PST is -08

# CPT, CPST - for Canadian Pacific (Standard) Time,

# by analogy with AEST in Australia

# P-T - conforming approximation to “PT”

# PT+ - like P-T but suggesting one-hour advance over PST

# Rule NAME FROM TO - IN ON AT SAVE LETTER/S

Rule Vanc 1918 only - Apr 14 2:00 1:00 D

Rule Vanc 1918 only - Oct 27 2:00 0 S

# Zone NAME STDOFF RULES FORMAT [UNTIL]

Zone America/Vancouver -8:12:28 - LMT 1884

-8:00 Vanc P%sT 1987

-8:00 Canada P%sT

-8:00 Canada P%sT 2026 Mar 9

-7:00 - -07

Zone America/Dawson_Creek -8:00:56 - LMT 1884

-8:00 Canada P%sT 1947

-8:00 Vanc P%sT 1972 Aug 30 2:00