Do you have an extensions that uses PHP functions getdate()? In order to track the last 24 hours being true or not? Or is there an extension that adds an extra variable?
To answer your question "please point me to the file which these arrays are being sent:" These commands look like controller syntax for sending arrays. So whatever file path you found this code look in the same paths but model or view. Example
view:
catalog/view/theme/*/template/account/shipping.tpl
or controller
catalog/controller/account/customerpartner/shipping.php // probably where you found this code...
or lastly model:
catalog/model/account/shipping.php'
in there you will be able to find