Add cities on the call, set work hours, and read one day grid for the first city. Green cells are inside that city's work window; the summary lists when every city is green at once. Daylight saving comes from each IANA zone in this browser. A share link keeps the plan after the hash so Benchvale never receives the cities.

Why a planner instead of a converter

Looking up one city's local time is a solved search query. Scheduling still fails when three cities each look free in isolation and none of the hours line up. This page answers the lineup question with a single day grid and a stated work window.

Daylight saving without a table to maintain

Each city is an IANA time zone. The browser applies the zone's current rules for the date you pick, including daylight saving transitions. The share link stores city ids and hours, not a fixed UTC offset, so a link opened after a transition still reads correctly.

A recurring meeting moves twice a year and nobody is told

Daylight saving does not start on the same date everywhere, and in the southern hemisphere it runs the opposite way. Between two northern cities the mismatch lasts a week or three each spring and fall; between a northern and a southern city the offset is different for months at a time. Either way a standing call that has worked since January can suddenly land in someone's commute, and nothing announces it. The page is right for the date you ask about, because it applies each zone's rules for that date. A recurring invitation is not a date, it is a series of them. Re-check a standing slot after each transition rather than trusting the one you booked.

Questions

What do the colors mean?

Green is inside that city's work window. Amber is within two hours of the window. Gray is night. The summary lists stretches where every city is green at once.

Whose hours run across the top?

The first city in the list. Remove and re-add cities to change the reference, or reset to the default New York, London, and Tokyo set.

Is the plan uploaded?

No. The grid is drawn in this tab. A share link keeps the selection after the hash mark, which browsers do not send with the page request, and the network gate fails the build if that ever changes.

Is a city always one time zone?

Not reliably. Some regions do not observe daylight saving at all while their neighbors do, and some countries and states are split across two zones, so a country name is not enough to place a colleague. Pick the city they actually work in. If a participant is somewhere the list doesn't resolve cleanly, ask them what their clock says at a fixed moment and work from that.

Related tools

More date tools land in the date and time hub next. For classroom scheduling jobs that are about names and seats rather than zones, use the classroom tools and the fair name picker.

Time zone meeting planner

Meeting day