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calendar.google.com

Update a Google Calendar event

Automatically update a Google Calendar event on calendar.google.com. Edit an existing Google Calendar event by its eid (from list_events/search_events/create_event). Opens the event composer and applies only the fields you pass — title, start, end (ISO datetime, or YYYY-MM-DD with all_day), all_day, location, description, add_guests — then Saves, sending update/invitation emails to guests when present. Single (non-recurring) events; a recurring instance's this/all scope dialog isn't handled. Changing start alone shifts the end to keep the duration unless you also pass end.

Input

eid required

Base64 event handle from list_events/search_events/create_event

end optional

New end: ISO datetime, or YYYY-MM-DD (exclusive) when all_day

start optional

New start: ISO datetime, or YYYY-MM-DD when all_day

title optional
all_day optional

Convert to/from all-day

location optional
add_guests optional

Guest emails to add (an invitation is emailed to each)

description optional

Output

eid required
changed required
updated required

FAQ

Edit an existing Google Calendar event by its eid (from list_events/search_events/create_event). Opens the event composer and applies only the fields you pass — title, start, end (ISO datetime, or YYYY-MM-DD with all_day), all_day, location, description, add_guests — then Saves, sending update/invitation emails to guests when present. Single (non-recurring) events; a recurring instance's this/all scope dialog isn't handled. Changing start alone shifts the end to keep the duration unless you also pass end.
Ask an AI agent connected to Reduck to run reduck/calendar.google.com/update_event, or run it from a terminal with the Reduck CLI: npx @reduck-ai/cli@latest run --script reduck/calendar.google.com/update_event
You do not need one. "Update a Google Calendar event" drives the real calendar.google.com pages in a browser, so it works whether or not calendar.google.com offers an API for this.
Required: eid. Optional: end, start, title, all_day, location, add_guests, description.
It returns eid, changed, updated.
Yes. It acts as you on calendar.google.com: on your own Chrome it reuses your session, and on a Reduck-hosted browser it loads the calendar.google.com cookies saved by the Reduck extension.
It makes changes on calendar.google.com, like sending, posting, booking or buying something.
Ask an AI agent connected to Reduck to run reduck/calendar.google.com/update_event, or run it from a terminal with the Reduck CLI: npx @reduck-ai/cli@latest run --script reduck/calendar.google.com/update_event
It is part of Reduck's official curated catalogue.

Related scripts

calendar.google.com

List Google Calendar events

List the signed-in Google Calendar account's events between two dates (across all visible calendars). Returns n and events (id, eid, title, all_day, start, end, timezone, location, description, calendar, organizer, attendees with response status, created, html_link). eid is the join key for delete_event. Date filtering is done on UTC boundaries; one call covers up to ~11 months from `from` (loop with a later `from` for more). Calendar events only — Google Tasks and reminders are not included.

calendar.google.com

Create a Google Calendar event

Create an event on the signed-in Google Calendar's primary calendar. Optionally invite guests (each gets an invitation email; external guests are auto-confirmed). Returns the new event's id, which you can pass to delete_event. A Google Meet link may be auto-added, depending on the account's default.

calendar.google.com

Delete a Google Calendar event

Delete an event from the signed-in Google Calendar by its eid (the base64 handle returned by list_events / create_event). Opens the event in the composer, uses More actions > Delete, sends a cancellation notice to any guests, and confirms by leaving the composer route. Single (non-recurring) events only — a recurring instance pops a this/all scope dialog this v1 doesn't handle. Irreversible.

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