How to change your quiet hour settings for SMS flows

How to change your quiet hour settings for SMS flows

Estimated 3 minute read

Updated Sep 10, 2026, 12:00 AM EST

Table of contents

You will learn
Before you begin
Change whether quiet hours are based on area code or Eastern time zone
Update quiet hours window
Additional resources

You need permission to edit account settings to change quiet hours. The Owner, Admin, and Manager roles include this permission.

You will learn

Learn how to change your quiet hour settings in Klaviyo, including:

Changing whether quiet hours are based on either:
Profile location (Campaigns only)
- For flows, this option uses phone number area code in the US and Canada, and the country’s default time zone elsewhere.
Eastern time zone
Updating when quiet hours are in effect for flow messages

For more information about quiet hours, check out our article on understanding quiet hours.

Before you begin

Please note the following:

Several countries have laws against sending during quiet hours.
Your custom quiet hours apply to all days of the week. Automatically enforced regional rules can differ by day.
It’s recommended that you set up quiet hours so that messages are not sent between 9 p.m. and 8 a.m. in your recipient’s local time (certain states may have stricter quiet hour rules).
If you send to recipients in Alaska or Hawaii, we recommend using the area-code option or adjusting the hours so that you aren’t sending between 8 p.m. and 2 p.m. ET.
These account settings apply to flow messages with quiet hours enabled. Mandatory regional restrictions can still apply when you turn off quiet hours for a message.

Change whether quiet hours are based on area code or Eastern time zone

Click your account name in the bottom left corner.
Navigate to Settings > Text message > Sender preferences.

Scroll to Quiet hours (or Quiet Hours for Flows), then open Advanced settings if it is collapsed.
Check the option you want to use for quiet hours:
Select Profile location (Campaigns only). If your account shows Phone number area code (US/Canada only), select that option.
For SMS flows, this option uses the phone number’s area code for US and Canadian recipients, not the profile’s location. Recipients outside the US and Canada use their country’s default time zone. See Understanding when and how Klaviyo sets a profile's location for how profile location is generally set.
To apply US state-level hours, select Enforce state-level quiet hours (US only). Your custom Stop sending and Resume sending times will not apply to US recipients.
Select Eastern time zone to use the country’s default time zone, such as Eastern Time for US and Canadian recipients.

Click Save to confirm your changes.
If a warning about potential non-compliance appears, review it before continuing. Click Cancel to return and adjust your settings. If you decide to proceed, select the I understand and want to continue. checkbox and click Confirm to save.

Update quiet hours window

To adjust your account’s default Klaviyo SMS quiet hours, follow the steps below. When Enforce state-level quiet hours (US only) is selected, your custom times apply to recipients outside the US. US recipients follow state-level hours, and mandatory regional restrictions still take precedence.

Navigate to your account name in the lower left-hand corner.
Click Settings > Text message > Sender preferences.

In the quiet-hours section, review the times listed under Stop sending and Resume sending. These define the period when messages cannot be sent in the selected time zone. For example, with Eastern time zone selected, you could set custom quiet hours from 7:30 p.m. to 11:30 a.m. Eastern Time for US and Canadian recipients.
Click the dropdown under Stop sending to change when quiet hours should start (i.e., what time the flow stops sending SMS).

Click the dropdown under Resume sending to change when quiet hours should end (i.e., what time the flow can begin to send out SMS).
Click Save in the quiet-hours section.
If a warning about potential non-compliance appears, review it before continuing. Click Cancel to return and adjust your settings. If you decide to proceed, select the I understand and want to continue. checkbox and click Confirm to save.

Additional resources

Understanding text message quiet hours in flows

Learn about Klaviyo quiet hours for SMS and MMS flows. - Understanding when and how Klaviyo sets a profile's location

Learn where to find location information for a profile, how it is used and updated, and more. When syncing or creating a new profile, Klaviyo determines the location and timezone information based on the profile's billing address. If a profile hasn't purchased, location and timezone are determined based on IP geolocation.

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