ICS Event Generator

About ICS event generator

Creates a calendar event file (.ics) that opens in Apple Calendar, Google Calendar, Outlook and other apps, with optional reminders, repeats, timezones and attendees. It suits organizers who want to attach an event to an email or a web page rather than ask everyone to enter it by hand.

How to use it

1. Fill in Title, which is required, plus optional Description, Location and URL.
2. Set Start date, Start time, End date and End time, or switch on All-day event.
3. For timed events, choose Timezone handling: Floating local, UTC or Named zone, and pick a zone from the list when needed.
4. Add an Organizer, attendee emails, a Reminder, a Status, and a repeat rule under Repeats, Every and Ends.
5. Fix any red messages, then select Download .ics or Copy file contents.

A fortnightly meeting in a named timezone

Title: Sprint planning, Q3, Description: Agenda; scope and risks, 5 Oct 2026 09:30 to 10:30, Named zone Asia/Dubai, Reminder 15 minutes, Repeats Weekly every 2, after 6 times

DTSTART;TZID=Asia/Dubai:20261005T093000
DTEND;TZID=Asia/Dubai:20261005T103000
SUMMARY:Sprint planning\, Q3
RRULE:FREQ=WEEKLY;INTERVAL=2;COUNT=6
TRIGGER:-PT15M (inside a VALARM block)
The file also has a UID and DTSTAMP, which differ per page load.

When to use it

• Attaching an add-to-calendar file to a webinar confirmation email.
• Publishing a recurring class or club meeting that repeats weekly until a set date.
• Blocking out a multi-day conference as an all-day event.
• Creating a reminder-equipped deadline that appears in every attendee's calendar.

Questions about ICS event generator

Why does an all-day event end a day later in the file?

Calendar files treat the end date of an all-day event as exclusive. You enter the last real day, and the tool writes the following day, so 24 to 26 December ends on 27 December.

Which timezone option should I choose?

Floating local shows the same clock time wherever it is opened. UTC suits a moment fixed worldwide, and Named zone keeps a meeting tied to a city. Named zone files carry the zone name only, so the calendar app supplies the rules.

Will attendees receive an invitation?

No. The file adds the event when opened, and it lists attendees, but nothing is emailed. Send the file to people yourself.

What happens if I import a changed file later?

The event ID stays the same while the page stays open, and calendar apps generally match on it, so a re-import updates rather than duplicates. Reloading the page creates a new ID.

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