Ruler Analytics reporting default time zone is Europe/London. However, if you are based elsewhere and want your lead information to reflect the timezone you are collecting data in you can configure this in your Dashboard.
To update your timezone follow the below steps
Go to Settings
Select Site-Setup
Under Timezone choose your desired Time zone from the drop down list
Please note that, timezone changes will be applied retrospectively to your entire data set within the dashboard. However, you can make changes to your timezone and revert them back whenever you need.