Corporate Event Invitations: Get the Time Zones Right

You send a corporate event invitation for Thursday's session. Ten in the morning, CET. By nine that morning your phone has three messages: one from São Paulo asking whether it has already started, one from Dubai saying she'll be twenty minutes late, and one from a colleague two floors down checking if the room changed. Nobody is being difficult. Your invitation gave each of them a different time.

A time zone isn't a line you add at the bottom. It's part of the time itself. Get it wrong and people don't just arrive late — they assume the meeting wasn't meant for them.

CET is not a time, it's an abbreviation people read differently

CET and CEST are two different clocks. In March the hour jumps forward, so a line written in February saying "10:00 CET" describes a different moment from the same words read in July. Keep the wording all year and someone turns up an hour early or an hour late, depending on the month. Saying "Madrid time" does something the initials can't: a guest in Milan or Mexico City knows straight away whether their own clock moves with yours, because the city carries the rule with it.

• Write the city, not the abbreviation: 10:00 Madrid time, not 10:00 CET.
• If the event happens in a room, fix the time in the city of that room: "10:00 in the Lisbon office" leaves nothing to guess.
• Check the wording after the spring and autumn clock changes, when CET becomes CEST and back again.
• If your team is spread across countries, set the time where the event actually takes place, not where you happen to be sitting.

10:00 in Madrid is 06:00 in São Paulo

Same sentence, two answers. In January, 10:00 in Madrid is 06:00 in São Paulo. In July it's 05:00, because Europe moves its clocks and Brazil doesn't. Nobody in São Paulo is going to work that out from your invitation, and they shouldn't have to.

For anything online, put UTC next to the local time. 10:00 (Madrid, UTC+1) is the only number that stays still all year. With half-hour offsets such as India (UTC+5:30) or Nepal (UTC+5:45), mental arithmetic stops altogether — so do the sums for your guest: 10:00 Madrid / 06:00 São Paulo / 13:00 Dubai / 18:00 Tokyo.

If two guests read your invitation and write down two different times, the invitation is the problem.

Why corporate event invitations beat a frozen PDF

Move the session from 10:00 to 11:00 and a PDF or a forwarded message means writing to everyone all over again and hoping each person opens the new one. A corporate event invitation built as a page with a link works differently: you correct the time, and everyone who already has the link is looking at the updated version. No second message, and no attachment called "final final". When the link is the invitation, the version that counts is the one published.

How to write the time, line by line

Use one line and repeat it. "Thursday 14 March, 10:00 Madrid time (UTC+1) — 06:00 São Paulo, 13:00 Dubai" tells everyone in a single sentence. Put the same time in every scene where it matters, the agenda, the session, the dinner, because nobody scrolls back to the cover to check whether it was ten or eleven. If the event runs all morning, give the end as well: "10:00 to 13:00, Madrid time" stops someone joining at three in the afternoon, sure they still made it.

And put the time where the decision happens. Confirmations arrive inside the invitation, in one ordered list, so add your own question to the form — "Which city are you joining from?" — and you'll know who is setting an alarm for six and who is walking into the room with you. That single answer saves more confusion than any footnote.

The next time your event time moves, you shouldn't be rewriting the same message to forty people one by one. Change the invitation, keep the same link, and let it do the work. Try it free, see how your cover comes out, and unlock it when you're happy.