> ## Documentation Index > Fetch the complete documentation index at: https://docs.macro.com/llms.txt > Use this file to discover all available pages before exploring further. # UpdateCalendarEvent > Update an existing calendar event. Only the supplied fields change; omitted fields keep their current values. The change is written to Google immediately and attendees are notified of it, so confirm details with the user first. Get the `eventId` from ListCalendarEvents. `scope` picks how much of a recurring series changes and is always required: "this_event" edits one occurrence (pass the occurrence's `recurrenceId` from ListCalendarEvents) and leaves the rest of the series alone; "all" edits the series itself — with `time` that MOVES EVERY OCCURRENCE, so never use "all" to reschedule a single occurrence. Non-recurring events use "all". There is no this-and-following update: end the series with DeleteCalendarEvent's "this_and_following" and create a new event instead. Passing `attendees` replaces the full attendee list — include everyone who should remain, not just additions. An empty string for `description` or `location` clears it. Fails on events from calendars the user cannot edit. `rsvp` sets the user's own response to an invitation and is independent of the field edits — it can be the only thing this call changes. It applies at the same `scope` as the rest of the call, and only works on events the user is actually an attendee of. # UpdateCalendarEvent Update an existing calendar event. Only the supplied fields change; omitted fields keep their current values. The change is written to Google immediately and attendees are notified of it, so confirm details with the user first. Get the `eventId` from ListCalendarEvents. `scope` picks how much of a recurring series changes and is always required: "this\_event" edits one occurrence (pass the occurrence's `recurrenceId` from ListCalendarEvents) and leaves the rest of the series alone; "all" edits the series itself — with `time` that MOVES EVERY OCCURRENCE, so never use "all" to reschedule a single occurrence. Non-recurring events use "all". There is no this-and-following update: end the series with DeleteCalendarEvent's "this\_and\_following" and create a new event instead. Passing `attendees` replaces the full attendee list — include everyone who should remain, not just additions. An empty string for `description` or `location` clears it. Fails on events from calendars the user cannot edit. `rsvp` sets the user's own response to an invitation and is independent of the field edits — it can be the only thing this call changes. It applies at the same `scope` as the rest of the call, and only works on events the user is actually an attendee of. ## Parameters | Parameter | Type | Required | Description | | ----------------- | --------------------------------------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `eventId` | string | Yes | The event's id, from ListCalendarEvents or CreateCalendarEvent. | | `scope` | `"all"` \| `"this_event"` | Yes | How much of a recurring series an update applies to. | | `recurrenceId` | string | No | The `recurrenceId` of the targeted occurrence, from its ListCalendarEvents entry. Required for "this\_event"; omit for "all". | | `title` | string | No | Replacement title. Omit to keep the current title. | | `description` | string | No | Replacement event body/description. An empty string clears it; omit to keep the current one. | | `location` | string | No | Replacement location label. An empty string clears it; omit to keep the current one. | | `time` | EventTimeInput | No | Replacement time: a timed span with `kind` "timed" (startsAt, endsAt, optional timeZone) or whole days with `kind` "allDay" (startDate, exclusive endDate). Omit to keep the current time. | | `attendees` | AttendeeInput\[] | No | Replacement attendee list — replaces all current attendees, so include everyone who should remain. Omit to leave attendees unchanged. | | `recurrenceLines` | string\[] | No | Replacement RFC 5545 recurrence lines. An empty list makes the event one-off; omit to keep the current recurrence. Only valid with scope "all". | | `conference` | `"google_meet"` \| `"remove"` | No | Change the event's video conference: "google\_meet" attaches a fresh Google Meet, "remove" detaches the current conference. Omit to leave it untouched. | | `reminders` | EventRemindersInput | No | Replacement notification reminders. `useDefault: true` follows the calendar's own defaults; otherwise `overrides` replaces the whole list with entries of `method` "popup" (a Macro notification) or "email" and `minutes` before the start — an empty list silences the event. Omit to keep the current reminders. | | `rsvp` | `"accepted"` \| `"declined"` \| `"tentative"` | No | Set the user's own response to the invitation: "accepted", "declined", or "tentative". Omit to leave their response alone. |