A Time slot is a session type where the attendee reserves a specific time from a list. The session has a defined duration (for example, one hour), which the system splits into individual slots (for example, 15-minute slots with a 5-minute break between them). The attendee picks the slot that fits their schedule. Typical use cases: test drives, one-on-one consultations, one-to-one meetings, social program (detail in Setting up reservations in the Agenda — buses, workshops, social program).
Decide the length of one slot based on how much time you need for the interaction. You can pick 10, 15, 20, 30, 45, 50, 60, 90, or 120 minutes; the default is 15 minutes. Other lengths (for example, 5 or 25 minutes) are not available.
Decide the break length between slots (a pause for handover or reset). You can pick 0, 5, 10, or 15 minutes; the default is 0 minutes, so slots follow each other back to back. The break is a separate setting and is not counted toward the slot length.
The maximum number of attendees per slot is usually 1 (one-on-one consultation), but you can allow more (group slots).
A Time slot is a session, so it has a stage, speakers (instructors / experts), and the other attributes of a regular session.
A session of type Time slot has, in addition to the usual tabs, an extra Slots tab in the edit panel. To create one:
Create a session of type Time slot (or a custom type built on this base).
Enter date, start, end — this defines the total session length (for example, 9:00–12:00 = 180 minutes).
In the Registration settings section, enter:
Time slot length — one of 10, 15, 20, 30, 45, 50, 60, 90, or 120 minutes. The default in the dropdown is 15 min.
Break length — pause between slots: 0, 5, 10, or 15 minutes (default 0 min).
Limit number of registrations — number of attendees per slot (default 1).
Save. The system generates the slots.
For a 180-minute session with 15-minute slots and a 5-minute break, the system generates 9 slots (9:00, 9:20, 9:40, 10:00, 10:20, 10:40, 11:00, 11:20, 11:40). A remainder at the end of the session that is shorter than one slot is not created as a slot.
The Slots tab is available only for sessions of type Time slot. It shows every generated slot — each with its time range, capacity, and number of registered attendees. Breaks between slots are shown as separate rows.
For each slot you can:
Toggle Active / Inactive — an inactive slot is not available for registration (typically when an instructor drops out and the slot is canceled). If the slot has registered attendees, saving shows a confirmation dialog with their number. Remove attendees and save cancels the registrations and deactivates the slot; if you close the dialog, the change is not saved.
Click the Attendees button to open the Edit attendees dialog — you see the list of registered attendees, the limit, and the capacity. The organizer can:
Remove an attendee from the slot.
Add an attendee manually (search in the field and add). Manually assigned attendees are marked as Assigned by organizer.
Turn on Notify attendee on manual assign/unassign — the attendee then gets an e-mail when you add them to the slot or remove them from it; the e-mail about being added includes an ICS file if Send ICS to attendee is on. The toggle applies only to that slot and is off by default.
The attendee opens the session in the attendee app.
They see the list of available slots with occupancy (if showing remaining spots is turned on).
They tap a specific slot, which registers them.
The slot shows up in My Agenda.
By default, the attendee sees the slots only after opening the session detail. If you turn on Expand time slots in the agenda on the Agenda's Settings tab, the slots appear directly on the session card in the agenda overview — the attendee picks a time without opening the detail. This fits agendas where the slots are the core content (for example, test drives or consultations).
A Time slot has the same set of registration settings as a Workshop:
Assign attendee to a group after registration
Registration only for selected groups
Limit registrations (per single slot, not per session as a whole)
Show the number of available spots
Registration time limits (Registration available from / until)
Session cancellation (Cancellation available until)
Notify the organizer / attendee
Send ICS to attendee
For details, see Setting up workshops and session registration.
The default value of Limit number of registrations for a Time slot is 1 (one-on-one meeting). You can raise it — for example, to 3 per slot for a group consultation. Everyone registered for one slot arrives at the same time.
When an attendee cancels their registration:
The slot is freed.
The spot becomes available for another attendee.
Happenee does not have an automatic waitlist — the spot is not reassigned automatically.
If you configured Session cancellation on the session, its deadline applies here too: after it passes, the attendee can neither cancel the registration nor switch to a different slot. You have to make the change for them. So set the deadline with an eye on how long you want slot swapping to stay open.
You can have several sessions of type Time slot in the Agenda at the same time (for example, Consultation with the CFO and Consultation with the CTO). Each session has its own slots. An attendee can register for slots from different sessions, but by default not for two slots whose times overlap. Overlapping slots are allowed only once concurrent registrations are turned on in the Agenda settings (see Building the event Agenda — architecture). Slots that merely follow one another do not overlap.
After the first attendee registers for a Time slot session, you cannot change:
The session type
Start and end time
Time slot length
Break length
Plan these parameters in advance. You can add more time (for example, 12:00–14:00 as a second session), but you cannot edit existing sessions after a registration.
A speaker is assigned to the session as a whole, not to a specific slot. Attendees in every slot see the same speaker / instructor. If you need to split slots between several speakers, create several sessions (one per speaker).
The shortest slot length on offer is 10 minutes. The real slot length has to match the real interaction: a one-on-one consultation usually needs 15–30 minutes plus a short break (5 minutes) for handover.
The slot start and end time are locked after the first registration. Plan the final schedule before opening registration. If you have to change it, cancel everyone's registration manually first, then edit, then open again.
Check that the session uses a type based on Time slot and has a Time slot length set. The break can be 0 minutes; slots are generated without it. The Slots tab shows what the system has generated.
Raise Limit number of registrations to 3. Note: everyone who registers arrives at the same time at the same slot. If you need more groups, create more sessions or split the time differently.
Happenee does not have a waitlist today. The freed spot is available to everyone — the first person to click Register gets it.
Deactivating the slot canceled the registration, so after reactivation the attendee is no longer in the slot and does not come back automatically. You have to look them up and add them manually through the Edit attendees dialog. If they should learn about being added back by e-mail, turn on Notify attendee on manual assign/unassign for the slot first.
