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Question

Fixing start and end datetime errors in Google Sheets to Google Calendar automation

  • August 15, 2025
  • 3 replies
  • 31 views
E

I am trying to set up an automation from Google Sheets to Google Calendar.
What I want is: whenever I enter a specific keyword or mark a row in green, Zapier should automatically create a Google Calendar event with a Google Meet link.
The event should have a specific title and description based on the information from that row in the spreadsheet.

I tried setting this up, but I’m getting the following error in Google Calendar:

Failed to create an event in Google Calendar
Required field "Start Date & Time" (start__dateTime) is missing. Required field "End Date & Time" (end__dateTime) is missing.

Could someone help me fix this issue, or suggest the correct way to reimplement this automation?

Thank you in advance.

This post has been closed for comments. Please create a new post if you need help or have a question about this topic.

3 replies

PatriciaF
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  • PatriciaFZapier Staff
  • Zapier Staff
  • 11 replies
  • August 15, 2025

 

Hello Ege,

I'm Patricia from the Zapier Support team—happy to help!

Based on the error you're seeing, it looks like the Zap is attempting to create a Google Calendar event without receiving valid values for the Start Date & Time and End Date & Time fields. These are required, so if those values are missing or blank, the step will fail.

 

Here’s what I suggest:

 

Make sure the Google Sheets row you're testing with has actual values in the date/time columns you're using. These should follow a format like: 2025-08-20 14:00 or 2025-08-20T14:00:00+01:00

Ensure the field does not look like this View screenshot

 

You can learn more about supported formats here:
Understanding Field Types in Zaps

 

Let me know how that goes—or if you want to share a sample row, I’ll be happy to help validate the formatting further.

Troy Tessalone
Zapier Orchestrator & Solution Partner
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  • Troy TessaloneZapier Orchestrator & Solution Partner
  • Zapier Orchestrator & Solution Partner
  • 34066 replies
  • August 15, 2025

Hi ​@Ege Özdemir 

Help us have more info about the error by posting these screenshots:

  • how your Zap steps are outlined
  • how your Zap steps are configured in EDIT mode with the field mappings visible in the CONFIGURE tab
  • the encountered error
⚡ Troy Tessalone - AutomationAce.com | Platinum Authorized Zapier Solution Partner | #1 Zapier Community Contributor
SamB
Community Manager
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  • SamBCommunity Manager
  • Community Manager
  • 9723 replies
  • September 18, 2025

Hey there ​@Ege Özdemir 👋

Just wanted to check how you got on with Patricia’s suggestion here - did it do the trick?

Let us know how it went, happy to lend a hand if you’re still stuck at all. 

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