---
title: "How to Override the Guest Time Zone on Your Booking Link"
description: "Ensure your guests see your available time slots in the correct time zone by overriding the default time zone behavior with the iana_time_zone URL parameter."
url: "https://help.oncehub.com/product/booking-calendars/sharing-embedding/how-to-override-the-guest-time-zone-on-your-booking-link"
---

When sharing your booking link, it is important to make sure your guests see your available time slots in the correct time zone for a smooth scheduling experience.

By default, OnceHub displays time slots to guests in their own time zone. You can override this behavior to show those slots in a specific time zone when needed.

[How To Override the Guest Time Zone On Your Booking Link](https://www.youtube-nocookie.com/embed/MsT-_RGWU4U?wmode=opaque)

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## Default time zone behavior

[Section titled “Default time zone behavior”](#default-time-zone-behavior)

By default, OnceHub detects a guest’s time zone based on their IP address. This ensures that a guest opening your link in London sees times in GMT/BST, while a guest in Los Angeles sees times in PDT.

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## Use case: in-person conferences and events

[Section titled “Use case: in-person conferences and events”](#use-case-in-person-conferences-and-events)

Manually overriding the auto-detected time zone is especially useful for avoiding confusion during in-person conferences or regional events. This ensures your guests always see the local time, regardless of where they are booking from.

* **The scenario:** Imagine you are hosting a conference in New York, but your attendees are booking their slots while still at home in Los Angeles.
* **The problem:** Without overriding the default behavior, an attendee scheduling from Los Angeles will see the schedule in Pacific Time, making an 8:00 AM New York session look like 5:00 AM.
* **The solution:** By appending `?iana_time_zone=America/New_York` to your booking link, every attendee sees the true event schedule in local New York time, no matter where they are currently located.

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## How to override the time zone via URL parameters

[Section titled “How to override the time zone via URL parameters”](#how-to-override-the-time-zone-via-url-parameters)

You can make a booking link initially show availability in a specific time zone by adding the `iana_time_zone` parameter to override the guest’s auto-detected time zone.

For example, if you add `?iana_time_zone=America/New_York` to the end of your booking link, the availability shown to guests will default to Eastern Time.

### Example Link Format

[Section titled “Example Link Format”](#example-link-format)

`https://go.oncehub.com/example?iana_time_zone=America/New_York`

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## How to find your IANA time zone value

[Section titled “How to find your IANA time zone value”](#how-to-find-your-iana-time-zone-value)

To use the `iana_time_zone` parameter, you must use a recognized identifier from the standard public IANA database.

You can find the complete, up-to-date list of valid time zone names by visiting the official [**IANA Time Zone Database**](https://nodatime.org/TimeZones).