Free tool Time zone converter for support teams

Pick a date and time in one place and see it everywhere else your customers and colleagues are, with daylight saving worked out for that exact date. Then add your agents and their working hours to see, hour by hour, when someone is on duty and where the gaps are.

IANA time zones, DST-aware
24-hour shift coverage
Runs locally

Converter

Convert a time, then check shift coverage

The first row is the zone you are converting from. Add or remove zones below the table; the share link keeps your selection.

Date

Offsets depend on the date, so pick the real one.

Time

24-hour clock.

In this time zone

Place	Local time	UTC offset
US Eastern — New YorkAmerica/New_York	09:002026-11-10 Tue	UTC−05:00EST	From
UTCUTC	14:002026-11-10 Tue	UTC+00:00UTC
US Pacific — Los AngelesAmerica/Los_Angeles	06:002026-11-10 Tue	UTC−08:00PST
UK — LondonEurope/London	14:002026-11-10 Tue	UTC+00:00GMT
IndiaAsia/Kolkata	19:302026-11-10 Tue	UTC+05:30GMT+5:30
China — BeijingAsia/Shanghai	22:002026-11-10 Tue	UTC+08:00GMT+8
Australia — SydneyAustralia/Sydney	01:002026-11-11 Wed+1 day	UTC+11:00GMT+11 · daylight saving

Add a time zone

US Eastern — New York  2026-11-10 Tue 09:00  (UTC−05:00 EST)
UTC  2026-11-10 Tue 14:00  (UTC+00:00)
US Pacific — Los Angeles  2026-11-10 Tue 06:00  (UTC−08:00 PST)
UK — London  2026-11-10 Tue 14:00  (UTC+00:00)
India  2026-11-10 Tue 19:30  (UTC+05:30)
China — Beijing  2026-11-10 Tue 22:00  (UTC+08:00)
Australia — Sydney  2026-11-11 Wed 01:00  (UTC+11:00)

Support shift planner

Add each agent or location with their local working hours. The grid shows, for each hour of the day in the zone you choose, how many people are on duty. A shift that ends before it starts, such as 22:00–06:00, runs overnight.

Show the grid in

Usually your own zone, or UTC for a team spread across continents.

Uses the date from the converter, because daylight saving can move a shift by an hour.

Name	Time zone	Starts	Ends	Days

	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
MayaUK — London
OwenUS Eastern — New York
LeoUS Pacific — Los Angeles
HanaJapan — Tokyo
On duty	1	1	1	1	1	1	1	1	1	2	1	1	1	2	2	2	2	3	2	2	2	1	1	1

On duty all hourPart of the hourOff

124 of 24 hours have at least one person on duty.
2No gaps: every hour has someone on duty.
3Two or more people on duty: 09:00–10:00, 13:00–21:00.

Runs entirely in your browser. Nothing you type here is uploaded or stored by TapCub.

Share these inputs: the values go after the # in the link, so they never reach a server.

Version v1.0Updated 2026-11-12Update history

Read the result

What the converter and the grid tell you

Both parts work on the same date, because offsets change through the year.

Local time and day

Each row is the same instant on a different clock. A “+1 day” or “−1 day” tag means the date is different there, which is the usual trap with Asia–America calls and deadlines.

UTC offset and abbreviation

The offset in force on that date. Zones with daylight saving show “daylight saving” in summer: New York is UTC−05:00 (EST) in November and UTC−04:00 (EDT) in July. Abbreviations like CST are ambiguous between countries; the offset and the IANA name are not.

On-duty count per hour

The bottom row of the grid. 0 is a gap: chats or tickets that arrive then wait until someone starts. 1 means a single point of failure if that person is busy or away. 2 or more is overlap you can use for handovers.

Gaps and overlaps

The summary lists them as time ranges in the grid’s zone. A light square means the person is on duty for only part of that hour, which happens with half-hour offsets such as India (UTC+05:30) or shifts that end at :30.

Time zones and daylight-saving rules come from the IANA database built into your browser, the same one operating systems use.

How to use it

From one meeting time to a full rota

Start with a single conversion, then build the team view.

1
Set the moment

Pick the date, time and the zone it is in. “Now” fills in the current time; “Use my time zone” switches the source to the zone your browser reports.
2
Add the places you care about

Customers’ markets, colleagues’ offices. Copy the result as text for a meeting invite or chat message.
3
Add your team

One row per agent or location, with local start and end times and working days. Pick the zone to view the grid in.
4
Close the gaps

Shift someone’s hours, add an overnight shift, or set an offline message for the hours you cannot cover. Share the link with your team.

How it works

Local time = UTC + the offset in force on that date

Every row is computed from one instant. The source time is converted to UTC using the source zone’s rules for that date, then shown in each zone with that zone’s rules.

Zones are IANA names such as America/New_York; rules, including daylight saving, come from the browser’s Intl time zone data
A time that is skipped when clocks go forward is flagged and moved to the next valid minute; a time that occurs twice when clocks go back uses the first occurrence
Shift grid: 24 one-hour slots from local midnight in the grid’s zone; each slot is checked at :00, :15, :30 and :45, so a person can cover part of an hour
A shift is matched against the agent’s own local weekday; an overnight shift belongs to the day it starts on

Unix timestamp converter

Convert

local = UTC + offset(zone, date)

09:00 EST (UTC−05:00) → 14:00 UTC → 22:00 in Beijing (UTC+08:00)

Same zone, different date

offset(New York, 10 Nov) = −05:00 · offset(New York, 14 Jul) = −04:00

Daylight saving moves the US and Europe by an hour; China and India stay fixed

Coverage per hour

on duty(slot) = people with any of :00 :15 :30 :45 inside their shift

Light square = 1–3 of the 4 checks

Worked example

Four agents, one gap that only appears in summer

The default team: Maya in London (09:00–17:30), Owen in New York (08:00–16:00), Leo in Los Angeles (09:00–17:00) and Hana in Tokyo (10:00–19:00), all Monday to Friday, viewed in UTC.

Coverage of the default team on a Tuesday, in UTC
Agent	Shift in UTC on 10 Nov 2026	Shift in UTC on 14 Jul 2026
Hana (Tokyo, no DST)	01:00–10:00	01:00–10:00
Maya (London)	09:00–17:30	08:00–16:30
Owen (New York)	13:00–21:00	12:00–20:00
Leo (Los Angeles)	17:00–01:00	16:00–00:00
Result	24 of 24 hours covered	23 of 24: gap 00:00–01:00

In July, daylight saving pulls London and the US an hour earlier in UTC while Tokyo stays put, and the hour between Leo’s end and Hana’s start is left empty. Pick the July date in the tool to see it. The fix is either Leo ending at 18:00 local in summer or an offline message for that hour.

Common mistakes

Where time zone planning goes wrong

The arithmetic is easy. The errors come from labels and dates.

Planning with today’s offset

A rota built in winter is an hour off in summer for every zone with daylight saving. Check both a January and a July date.

Trusting abbreviations

CST is US Central, China Standard and Cuba Standard time; IST is India, Ireland and Israel. Use the city or the IANA name.

Forgetting the date line

Friday afternoon in California is Saturday morning in Sydney and Tokyo. Weekend coverage has to be checked in local days, not yours.

Counting one person as coverage

A single agent on duty cannot cover lunch, sick days or a busy spike. Treat hours with one person as thin, not covered.

In TapCub

Working hours that the chat widget follows

Once you know who covers which hours, put the same hours into TapCub so visitors see the right thing at any time of day.

Working hours and status per agent

Set each agent’s hours and online status; route threads to online agents and send the rest to an offline message.

Learn more

Offline messages for the gaps

Outside working hours the widget collects a message and an email, so the hours your rota cannot cover are not lost.

Learn more

Two-way translation

A team spread across time zones often spans languages too. Visitors write in theirs, agents reply in their own.

Learn more

See TapCub live chat

FAQ

Time zone questions

Still have a question?

Chat with the team behind TapCub — we usually reply within a few hours on business days.

Chat with us Help center

What is my time zone?

Your browser reports it, and the tool shows it under the buttons, for example “America/Chicago, currently UTC−06:00”. Click “Use my time zone” to convert from it. If it looks wrong, check the time zone setting of your device.

How do I convert PST to EST?

Add 3 hours: 09:00 PST is 12:00 EST. In summer both switch to daylight time (PDT and EDT) on the same dates, so the difference stays 3 hours. Pick “US Pacific → Eastern → UK” in the presets.

How do I convert UTC to my local time?

Choose UTC as the source zone, enter the time and click “Use my time zone” or add your zone to the list. Your row shows the local time and whether it falls on a different day.

Does the converter handle daylight saving time?

Yes, per date. Offsets come from the IANA time zone database in your browser, so a date in July and one in November can give different results for the same zones. Times skipped or repeated at the switch are flagged.

What is the difference between GMT and UTC?

For everyday scheduling they are the same clock. UTC is the precise time standard; GMT is also the name of the UK’s winter time. London is on BST (UTC+01:00) in summer, so “London time” and “GMT” differ for half the year.

How many agents do I need for 24/7 chat support?

At least enough shifts to put one person on every hour, and more for the hours with the most chats. Covering 168 hours a week with 40-hour contracts takes more than four people once breaks and leave are included. Use this grid for the shape and a staffing calculation for the numbers.

Can I share the view with my team?

Yes. The share link stores the date, zones and team rows after the # in the URL. Anyone who opens it sees the same grid, and nothing is stored on a server.

Changelog

Update history

New features, fixes and data refreshes for this tool, newest first.

2026-11-12 · v1.0

LaunchedFirst release.

Missing something or found an error? Tell us — requests that come up often go into the next update. All tool updates

Next step

Let visitors know when someone is around

In TapCub live chat you set working hours per site and per agent; outside them the widget collects a message and an email instead.

Start free See TapCub live chat

Unix timestamp converterTurn timestamps from logs into dates in any zone. Out of office message generatorWrite the message visitors see when no one is on duty. WhatsApp link generatorA click-to-chat link and QR code for your support number.

Free tool Time zone converter for support teams

Convert a time, then check shift coverage

What the converter and the grid tell you

From one meeting time to a full rota

Set the moment

Add the places you care about

Add your team

Close the gaps

Local time = UTC + the offset in force on that date

Four agents, one gap that only appears in summer

Where time zone planning goes wrong

Planning with today’s offset

Trusting abbreviations

Forgetting the date line

Counting one person as coverage

Working hours that the chat widget follows

Working hours and status per agent

Offline messages for the gaps

Two-way translation

Related tools, terms and guides

Time zone questions

Update history

Let visitors know when someone is around

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