Daylight saving time for a timed sports drill

You set a time for a team drill, but one athlete is in another city, traveling, or joining remotely. When daylight saving time changes, the local clock can move by an hour, and different places do not always change on the same date.

Use the World Clock to compare the cities involved, then check the date and time zone before you share the schedule. This helps you distinguish the drill's start time from the amount of time each athlete should spend on it.

Check the drill time across locations

1. Open the World Clock and compare the cities where the coach and participants will be on the day of the drill.
2. Write down the full date, the local start time, and the time zone for the person setting the schedule. Avoid sending a time such as “7:00” without saying whose local time it is.
3. Check whether each location observes daylight saving time and whether its clock changes before the drill. The change dates are not the same everywhere.
4. Compare the converted local start times for the participants. For a date close to a clock change, verify the conversion for that specific date rather than relying only on the current time difference shown between cities.
5. Share one clear schedule, such as “Saturday, October 31, 9:00 a.m. Eastern Time, which is 6:00 a.m. Pacific Time.” Ask participants to confirm their local time before the session.

Keep the drill duration separate from its start time. “Start at 9:00 a.m. and complete six 30-second rounds” gives the group both a shared start and a clear workload. The clock change affects the wall-clock label, not the length of a 30-second effort.

What the time comparison means

The time difference is the one you expected

If the locations show the expected offset for the drill date, the start time is probably lined up. Still include the date and time zone in your message. A familiar city-to-city difference can change during part of the year, even if it is correct today.

One location appears an hour earlier or later than expected

This can happen because one place has changed its clocks and another has not, or because one location does not observe daylight saving time. It does not necessarily mean the tool or the schedule is wrong. Check the selected city and the date, then confirm which time zone the original start time refers to.

The local time falls inside the clock-change hour

In places that move clocks forward, some local times do not occur. In places that move clocks back, an hour can occur twice. For example, a local time around 1:30 a.m. during the autumn change may be ambiguous unless you also give the time zone or UTC offset. Avoid scheduling a drill at a repeated or skipped local time. Choose a time outside the changeover period and state the time zone clearly.

The drill crosses the clock change

A session that runs overnight while clocks change can have a wall-clock end time that looks shorter or longer than the actual session. Tell participants how long to work in elapsed time, such as “run for 20 minutes,” and identify the start time with its time zone. Do not calculate the duration by subtracting the displayed start and end clock numbers alone.

How to prevent a schedule mistake

1. Include the date and time zone. Write a named zone, such as Eastern Time, rather than just “local time” or an abbreviation that may be used in more than one place. Add the recipient's local equivalent when people are in different cities.
2. Check the operating system's time settings. On Windows 11, open Settings › Time & language › Date & time and check the time zone and automatic time settings. On a Mac, open System Settings › General › Date & Time. A wrong device time zone can make calendar reminders and displayed local times misleading.
3. Check the phone that will show the schedule. On an iPhone, open Settings › General › Date & Time. On Android, look under Settings › System › Date & time; the wording can vary by manufacturer. Check that automatic time and time zone are enabled if the device should set them from the network.
4. Recheck after travel or a settings change. A device may retain a manually selected time zone after you travel. Compare the city shown by the device with the place where the athlete will actually be on drill day.
5. Send an update if the date changes. A time conversion that was right for the original date may be wrong for a new date near a daylight saving transition. Recheck the city comparison and resend the complete date, start time, and zone.

Why daylight saving changes vary

Daylight saving time is a local rule, not a single worldwide clock change. Some locations move clocks forward and back, others keep the same offset all year, and the change dates can differ between countries or regions. Even nearby places can follow different rules.

The usual spring change skips an hour on the local clock, while the usual fall change repeats an hour. Those descriptions apply only where the relevant daylight saving rule is in effect. Do not assume that every location changes clocks on the same weekend, or that the time difference between two cities is always fixed.

For a drill on a transition weekend, use the World Clock for a quick comparison, then confirm the time for the specific date with the schedule or calendar your group will use. Send the start time with its date and time zone, and describe the workout length in elapsed minutes or seconds.