Time Zones and Scheduling Around Releases
Every release time on your calendar is a conversion, and a conversion that is one hour wrong puts you in the market at exactly the moment you planned to avoid.
Economic data is released on the local clock of the publishing agency, so calendar times must be converted to your own zone. US releases at 08:30 Eastern are 13:30 UTC in winter and 12:30 UTC during American daylight saving. Because the US, Europe and Australia change clocks on different dates, there are several weeks each year when the usual gap between regions is wrong.
What to remember
- Set your calendar to a named city, not a fixed UTC offset, so it follows daylight saving instead of drifting an hour twice a year.
- The US and EU change clocks three weeks apart in spring, which shifts every American release relative to your local morning for that window.
- A rate decision and its press conference are two separate events, usually 30 to 45 minutes apart, and they often move price in opposite directions.
- An alert at the release time is too late to act on. Fifteen minutes early is enough to reduce a position while spreads are still normal.
Lesson 6 of 16 in Economic calendar and news
Economic data is published on the local clock of the agency releasing it, which means every release time on your calendar is a conversion. Get the conversion wrong and you are not slightly early or late, you are holding a full-sized position through the one minute of the day you had planned to avoid.
08:30 in Washington is not a fixed time on your clock
The major US releases go out at 08:30 Eastern. In January that is 13:30 UTC. In July it is 12:30 UTC, because the United States is on daylight saving and UTC is not. A trader in London sees 13:30 both times, because the UK also shifts. A trader in Tokyo, Dubai or Sydney sees the hour move under them twice a year, and an alert set to a hard-coded UTC time is an hour wrong for half the year.
The failure is specific and expensive. You set an alarm for 13:30 to flatten a position before an inflation print. The release happens at 12:30. By the time your alarm fires you are sixty minutes into a move that has already run 70 pips against you, on a 0.3 lot position that is $210, and the stop you thought would protect you filled somewhere worse than its level because the book was thin when price went through it.
The three weeks a year when Europe and America disagree
Clock changes are not synchronised. The United States moves to daylight saving on the second Sunday in March, the European Union on the last Sunday in March, and the UK with it. That leaves roughly three weeks in spring when the usual gap between London and New York is one hour smaller than normal. In autumn the sequence reverses and there is another week of mismatch. Australia moves in the opposite direction entirely, being in the southern hemisphere.
During those windows the London and New York overlap, the most liquid hours in the forex session map, shifts by an hour, and so does every US release relative to your local morning. Calendar tools handle this correctly if you set a location rather than a fixed offset. Anyone who wrote down a UTC time last November and has not checked it since does not.
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Time Zones and Scheduling Around Releases: questions
What time are US economic releases published?
Why do economic calendar times change twice a year?
How far in advance should I set a news alert?
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