October 29, 2025
Clock Wars: GMT vs BST
A History of British Summer Time
100 years of BST—and now the comments are fighting over GMT, kids, and “geezer”
TLDR: It’s 100 years since the UK made British Summer Time permanent and pushed the clock-back date to October. The comments spiral into a lively GMT-vs-BST debate—keep standard time all year or protect those long summer evenings—plus a surprise linguistic squabble over the word “geezer,” and a helpful museum link.
A century after British Summer Time (BST) was locked in by the 1925 Act—moving the clock-back date to October and simplifying a history of wild time tweaks—the comments are the real show. The post recaps everything from wartime Double Summer Time (basically GMT+2!) to the bonkers 1947 year when clocks changed four times. But the crowd? They’re split, loud, and funny. One loud camp asks: why not just stick to GMT (Greenwich Mean Time) all year? User pmg101 says the arguments about kid safety and farmers are actually pro-GMT, not pro-BST, questioning whether late sunsets are worth the hassle. The other vibe: lovers of long summer evenings who won’t give up their 9:30 p.m. sunsets without a fight. Meanwhile, the thread swerved gloriously off-topic: ogogmad set off a mini-culture war over the word “geezer”—elderly man in American English, just “guy” in British English—with readers giggling at the linguistic whiplash. And when things got too spicy, susam played teacher with a handy link to Royal Museums Greenwich. The tone? Peak British: a mix of pedantry, pub banter, and a dash of “are we really doing this?” drama. Time, tradition, and trolling—what more could you want?
Key Points
- •British Summer Time was made permanent by the Summer Time Act 1925, which also set clocks back the day after the first Saturday in October.
- •Initial UK adoption of daylight saving occurred in 1916 after Germany’s introduction, with specific dates defined by the Summer Time Act.
- •From 1925 to 1938, clocks moved forward the day after the second Saturday in April (adjusted for Easter) and back the day after the first Saturday in October.
- •Wartime regulations delayed end dates in 1939, introduced permanent summer time in 1940, and created Double Summer Time from 1941; GMT was not observed 1940–1945.
- •Postwar adjustments included two clock-back changes in 1945 and four changes in 1947 due to fuel shortages, with a return to the 1925 framework by 1953.