Hi guys,
It's my first time implementing offline conversions to Google Ads.
I have quite a simple setup where I made a connection between the CRM (Odoo) and Google Ads.
But I keep getting an error: Date is after allowed maximum., at conversions[0].conversion_date_time
I have read many articles and topics about this but non are giving me the solution I'm looking for.
You can see below the Google Ads confuguration.
+14Hi
TIP: Try asking AI for help understanding the error.
Basically, Google Ads thinks you’re trying to report a sale or lead that hasn't happened yet.
The system sees your timestamp and says, "Wait, it's only 10:00 AM, but this record says the customer bought something at 10:05 AM. I can't accept data from the future!"
Clock Desync: Your computer or server clock is a few seconds or minutes faster than Google’s clock.
Timezone Confusion: You might be sending the time in your local time, but Google thinks it’s in a different timezone, making it look like it's hours ahead.
Wrong Format: A tiny typo in the date or time format is making Google misread the hour.
The easiest "quick fix" is to set the conversion time to 5 or 10 minutes ago.
This gives the data a "buffer" so it’s guaranteed to be in the past by the time Google processes it.
Since you're sending data from Odoo, here are the 3 things I’d check first:
1. Timezone mismatch (most common cause)
Odoo often stores dates in UTC, but Google requires the timestamp with an offset.
Example of valid format:2026-02-14 10:30:00+01:00
If you send 2026-02-14 10:30:00 with no offset → it can trigger that error.
2. Conversion date vs click date window
Google only accepts offline conversions that happened:
after the ad click
within 90 days of the click
If your CRM is sending a later stage date (like “deal closed” weeks later), that could exceed the allowed range.
3. Wrong field mapped
Double-check you didn’t accidentally map:
record last updated date
instead of
actual conversion event date
Quick test: manually send a conversion with today’s timestamp + timezone offset.
If that works, you know the integration is fine and the issue is just the date value being sent.
+5Hello
That error usually means the conversion_date_time you’re sending is outside Google’s allowed window.
For offline conversions, Google requires:
• The conversion happens after the ad click
• It’s within 90 days of the GCLID
• The timestamp includes a timezone and uses the correct format
Required format:
YYYY-MM-DD HH:MM:SS+TZ
Example: 2026-02-13 15:32:32+01:00
In Zapier, try adding a Formatter by Zapier → Date/Time step to reformat the date and include the timezone. Also double check the GCLID isn’t older than 90 days.
Dr. Tanvi Sachar
Monday Certified Partner, Tuesday Wizard
+11Hi
Let us know which approach worked, or whether you’re still stuck. Want to make sure you’re all set! 🙂
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