Hi @erggraber,

Thanks for sharing this question with us.

When a profile makes their first purchase, Klaviyo uses the billing address from the purchase event data to update location and timezone. And only when a user opens an email (rather than receives an email) are we able to set a location and/or timezone. For all scenarios where timezone or location are updated, see our article here.

Thanks for being a community member.

@erggraber adding to this I would say it will be when a user is identified on the website rather than only when a user opens an email. 

So if he subscribes prior to buying this will be updated as well.

Omar Lovert // Polaris Growth // Klaviyo Master Platinum Partner

We help with e-commerce growth through CRO, Klaviyo and CVO