BigMarker News & Updates Multiple Events in One ICS File

One ICS file, every session as its own event

October 22, 2026
One ICS file now holds an event for each session, so calendars block the hours each session is live, not the whole series.
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A series can run for weeks or months, but a calendar only needs the hours each session is live. Now one ICS file can hold multiple events: one for each session the registrant signed up for, with its own date, time and link.

One ICS file, multiple events

With Make each session its own calendar event turned on, the ICS file attached to your series' confirmation email holds multiple events: one for each upcoming session the registrant is registered for, soonest first.

Each event carries its own session's title, date, time and link, plus the reminder you set, so every session shows up on the day it happens and the weeks between sessions stay free.

One invitation.ics file holding four events, beside a November calendar where the series' Nov 5 to Dec 3 event gives way to each Thursday's 11:00 to 12:00 session.
Illustration
Switch offSwitch on
Events in the ICS fileOne, for the seriesOne for each session
Time it holds on the calendarFrom the series' start to its endEach session's own hours
Title and linkThe series'Each session's own

Turn it on in three steps

Open your series, then Emails → Registration.

1
Open the confirmation emailNext to Registration Confirmation Email, click Actions and choose View details.
The Emails page, Registration tab: Registration Confirmation Email is On, with its Actions menu.
2
Choose Edit ICSOpen Actions at the top of the email's page and choose Edit ICS. The Edit ICS File panel opens on Setup.
Registration Confirmation Email with its Actions menu open: Schedule, Edit ICS, Export CSV, Send a test email, Delete.
3
Switch it on and saveKeep Generated by BigMarker as the ICS file source, turn on Make each session its own calendar event and click Save. All Day, Start Time and End Time step aside, because each event takes its date and time from its own session. Reminder and Description now apply to every session's event.
Edit ICS File, Setup: Make each session its own calendar event is on, followed by Reminder (30 minutes) and Description.

What each registrant gets

BigMarker builds the one file for each registrant from the sessions they're registered for.

The registrantTheir calendar file
Registered for the seriesOne file with an event for every upcoming session (sessions copy the series' registrations by default)
Chose their sessions in an itinerary seriesOne file with an event for each session they chose
Has no upcoming sessions leftOne event for the series

Past and canceled sessions are left out, and a file holds up to 50 events.

Settings that wait while it's on

On the Settings tab, two settings hold still while each session is its own event, and come back to your choices when you turn it off.

SettingWhile it's on
Auto-add to calendarHeld at Off: the calendar arrives as a file registrants open, because a calendar with several events can't carry an invite
Replace Calendar EventLocked: each session's event uses that session's own identifier
Edit ICS File, Settings: Auto-add to calendar held at Off with its note, and Replace Calendar Event locked.
Made for the confirmation email

The option lives on a series' Registration Confirmation Email. Calendar files on the series' other emails keep one event, and a file you upload with Upload Custom ICS is sent as you made it.

One ICS file, every session
Find it in your series under Emails, Registration Confirmation Email, Edit ICS.
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Webinar: Calendar Events for Every Series Session by Product Update Hub