Setster will auto detect your customer timezone. This information is received from their connection, usually their ISP or mobile network that they are using sends this signal to us.
When your customer is booking they see your timezone and theirs and can change their own timezone to a correct one if it is not detected correctly.
To turn this feature on or off visit Setster.com.
Log in, Settings > Profile > Localization and locate feature
"Hide "Timezone Alert Detection" when booking