Send inside each prospect's working hours, on their working days, and read those hours on your own clock. Pick your time zone and theirs to see when each one is open, where they overlap, and which of your days their Monday lands on. Free, no signup, nothing leaves your browser.
Your sending
Example zones and hours. Replace them with yours.
Sending windowIn each prospect's own time zone. 09:00 to 17:00 is an example office day, not a researched best time.
When to send, on your clock
No shared hour
On your Monday there is no hour when all 2 time zones are inside the window at once. Send to each one in its own hours, below.
Your Monday 11 January 2027, hour by hour
UK, UTC+00:00. A bar is when that zone's window is open.
Their Monday, 09:00 to 17:00 their time, on your clock
| Prospects in | Their clock | Send between, your time |
|---|---|---|
| US Eastern | UTC−05:005 hours behind you | 14:00 – 22:00 |
| Sydney | UTC+11:00 (daylight saving)11 hours ahead of you | Sun 22:00 – Mon 06:00Their Monday opens on your Sunday. Their Mon–Fri opens on your Sun–Thu. |
Offsets come from your browser's time zone data for this date. In the weeks around a clock change the gap between two places can be an hour off from usual, so check the date you will send on.
Skip the time zone maths.
Monty sends during each recipient's working hours, on the days you pick, wherever they are.
Start with your listHow it is worked out
A worked example. These are example time zones and hours, not a recommendation. A sender in UK wants to reach prospects between 09:00 and 17:00 their time, Monday to Friday. On Monday 11 January 2027 that means: US Eastern (UTC−05:00) between 14:00 and 22:00; Sydney (UTC+11:00) between 22:00 on your Sun and 06:00 on your Mon. No hour of the sender's day is inside both windows, so each zone gets its own sending hours.
The offsets come from the time zone data built into your browser, for the date you pick. A window that ends before it starts, such as 22:00 to 06:00, runs overnight into the next day.
Send inside each prospect's own working hours, not yours. Pick a window in their local time, for example 09:00 to 17:00, and convert it to your clock for each time zone. From UK on Monday 11 January 2027, that is US Eastern (UTC−05:00) between 14:00 and 22:00; Sydney (UTC+11:00) between 22:00 on your Sun and 06:00 on your Mon. This planner does the conversion for your zones and date.
This page does not name one. We cannot point you to data that backs a single best hour for your audience, and your own replies are a better guide than a general figure. What you can control is that the email arrives while the prospect is at work, not at 3am their time, and on a day they work.
Places far ahead of you start their day before yours does. Sydney is 11 hours ahead of London in January, so 09:00 on a Sydney Monday is 22:00 on a London Sunday. If you only send on your own weekdays, your Sydney prospects get nothing on their Monday morning and an email on their Saturday. Pick sending days in the prospect's time zone, and the planner shows which of your days they land on.
Countries change their clocks on different dates, and some never do. The US moves its clocks a few weeks before the UK and Europe in spring, and a week after them in autumn, so for those weeks New York is four hours behind London instead of five. Australia's daylight saving runs in the opposite half of the year. The planner reads the offsets for the date you pick from your browser's time zone data.
No. The planner runs in your browser and sends nothing to a server. Once you change something, the inputs go into the page address so you can share the schedule; nothing else keeps them.
Before you book
The price
$1,399 a month. No setup fee.
Prices shown in USD. Billed in the same currency at checkout.
If it does not work
Cancel inside 30 days and your payment comes back in full. No usage deduction, no form to fill in.
How you leave
Monthly, and you cancel from inside the product. No contract, no notice period, no minimum term — the tools this replaces mostly ask for a quarter or a year up front.