A time zone planner for work across cities
Tempo is a free browser-based world clock for people coordinating across time zones. Add the cities where teammates, clients, or collaborators work, then read their local times together on one synchronized dial. When you scroll one city, the other columns move with it, making it easier to compare the same moment instead of doing separate mental conversions.
The dial shows how a chosen instant lands in each location, including when the local calendar date changes. Choose a date to account for daylight-saving transitions, which happen on different schedules around the world. This is useful when a recurring meeting that worked last month moves by an hour for only some participants.
Find a meeting window that fits the team
Use the work-hour shading to scan for periods when several cities are within typical working hours. Brighter overlap highlights the hours shared by more locations; it is a planning aid, not a claim that every person follows the same schedule. Add a highlight block for a proposed meeting, handoff, interview, or workshop and compare its local start and end times across the team.
A visual comparison is especially helpful when a meeting crosses midnight for one participant or when a date change makes a calendar invitation easy to misread. Confirm the final time in your calendar before sending an invitation, particularly for dates near daylight-saving changes or for teams with flexible working hours.
How to use Tempo
1. Add the cities you need
Start with your own location, then add each city that needs to join the conversation. You can label a column with a team or person’s name to make a shared schedule easier to scan. The displayed city time zones come from the browser’s time-zone data.
2. Set the date and compare hours
Use the date control when planning ahead. Scroll the dial to inspect different hours; all city columns stay aligned to the same instant. Switch between 12-hour and 24-hour time if that is clearer for your group, and check the date shown in each column when participants are far apart.
3. Mark a candidate window
Highlight a block of time to keep a possible meeting window visible while you compare locations. A highlighted range can represent working hours or a proposed event. Use the overlap colors to narrow the options, then share the chosen instant in a calendar invitation that names the time zone.
When a synchronized clock helps
Distributed teams can use Tempo to find a reasonable overlap for recurring meetings, plan customer calls, and coordinate work handoffs. Freelancers can compare a client’s local hours with their own availability. Friends and families can check whether a call lands in the morning, evening, or next day for everyone. Event organizers can compare arrival times for speakers joining remotely.
Tempo is designed for comparing time, not replacing a calendar or scheduling policy. It does not know a participant’s personal availability, local holidays, or preferred work schedule. Ask people for their constraints, make the decision with the team, and use a calendar invite as the source of truth for the appointment.
Time-zone planning questions
Why can the time difference change during the year?
Some regions observe daylight saving time and others do not, and their clock changes may happen on different dates. That means the offset between two cities can change temporarily. Select the meeting date in Tempo instead of assuming today’s difference will apply later.
Does the highlighted overlap mean everyone is available?
No. It compares clock hours against the visual work-hour ranges. It cannot know holidays, individual schedules, or local team agreements, so use it to shortlist options and confirm availability with participants.