Why am I getting a persistent "Start and end times" error when trying to create an event in Google Calendar, despite using the same time format?

[user-1]

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Hey all, getting a persistent error with google_calendar-create-event. Every request fails with: “Start and end times must either both be date or both be dateTime.”
Tried multiple formats, all fail:
• RFC3339 with offset:

"eventStartDate": "2025-10-21T14:00:00-04:00",
"eventEndDate": "2025-10-21T16:00:00-04:00"

• Without offset:

"eventStartDate": "2025-10-21T14:00:00",
"eventEndDate": "2025-10-21T16:00:00"

• UTC:

"eventStartDate": "2025-10-21T18:00:00Z",
"eventEndDate": "2025-10-21T20:00:00Z"

• Nested objects:

"start": {
  "dateTime": "2025-10-21T14:00:00",
  "timeZone": "America/New_York"
},
"end": {
  "dateTime": "2025-10-21T16:00:00",
  "timeZone": "America/New_York"
}

Same error every time even though both times are in the same format. Known issue?

[user-1]

Hi , the date format with RFC3339 should work with the latest action code. I think you can unset the Time Zone prop and only use the timezone on the Start Date & End Date