Daylight saving time (DST)DSTIntermediate
The clock change in spring and autumn. The UK and the US change on different dates, so for a few weeks a year London is only 4 hours ahead of New York.
What it means
The US moves clocks forward on the second Sunday of March and back on the first Sunday of November. The UK moves on the last Sunday of March and the last Sunday of October.
In those gaps (about 3 weeks in March and 1 week in October and November) every London-time window shifts by an hour against New York. If your rules are written in New York time, the market opens stay in the same place; if they are written in UTC, they move.
How to spot it
- Check the date: late March and the end of October are the usual mismatch weeks.
Common mistakes
- Writing killzones in UTC or your own local time and wondering why results shift twice a year.
Asian, London and New York sessions and the ICT killzones, with exact times in New York and London time, daylight saving notes and test rules.
Related terms
What a mechanical test can and cannot tell you about smart money concepts.
Education only, not financial advice. Definitions vary between teachers; these are ours, written for clarity.