I posted on this last week as a heads up, now a reminder ICYMI!
The US and Canada will put their clocks forward one hour on Sunday, March 14.
If you trade US markets (or Canadian) and are not based in either country then it likely you'll need to adjust your start and finish times in your local time. As of next week US data release times will also be different in your local time.
Coming up really soon ... Europe and the UK will switch to DST on Sunday, March 28.