Google Calendar Search Events - Start Date and End Date showing as empty

[Tim_Teather]

I’m trying to create a calendar availability checker using a webhook → Google Calendar Search Events workflow, but
the Start Date and End Date fields keep showing as “empty” in the execution logs.

Setup:

• Webhook receives: date: "2025-09-17" and time: "12:00"
• Google Calendar Search Events module
• Start Date: {{parseDate(webhook.date + " " + webhook.time; "YYYY-MM-DD HH:mm")}}
• End Date: {{addMinutes(parseDate(webhook.date + " " + webhook.time; "YYYY-MM-DD HH:mm"); 1)}}

Problem:
In execution logs, both dates show as “empty” and Google Calendar returns ALL events instead of filtering by the
specific time range.

What I’ve tried:

• Different format strings: “yyyy-MM-dd HH:mm”, “YYYY-MM-DDTHH:mm:ss”
• Manual string concatenation: webhook.date + "T" + webhook.time + ":00"
• Various parseDate syntaxes suggested by Make AI

Question:
What’s the correct syntax to convert webhook date/time strings into valid Google Calendar API timeMin/timeMax parameters in Make?

Heres the 7 files I can upload

scenario.blueprint.json (15.9 KB)

[samliew]

Welcome to the Make community!

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[Tim_Teather]

thanks @samliew for helping me understand what’s needed when getting support. Ive added what I can but limited to 7 items. The scenario now is slightly different as ive been trying lots of different things unsuccessfully….

[Tim_Teather]

Hi @samliew problem resolved by removing set variables (as this wasnt doing anything) and correcting the start date and end dates to be
{{formatDate(parseDate(6.date + " " + 6.time; “YYYY-MM-DD HH:mm”); “YYYY-MM-DDTHH:mm:ss.000Z”)}} and {{formatDate(addMinutes(parseDate(6.date + " " + 6.time; “YYYY-MM-DD HH:mm”); 1); “YYYY-MM-DDTHH:mm:ss.000Z”)}}
For anyone reading this post i have added a minute just to check availability at that point in time but if you want to you could add an hour if checking a block of time using addHour().