error using installation profile

when testing the checkout function of a recent install using the installation profile.

receive errors as follows:

* warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/London' for '0.0/no DST' instead in C:\xampp\htdocs\UberDrup\profiles\uberdrupal\modules\ubercart\uc_store\uc_store.module on line 1392.
* warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/London' for '0.0/no DST' instead in C:\xampp\htdocs\UberDrup\profiles\uberdrupal\modules\ubercart\uc_store\uc_store.module on line 1393.
* warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/London' for '0.0/no DST' instead in C:\xampp\htdocs\UberDrup\profiles\uberdrupal\modules\ubercart\payment\uc_credit\uc_credit.module on line 1347.
* warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/London' for '0.0/no DST' instead in C:\xampp\htdocs\UberDrup\profiles\uberdrupal\modules\ubercart\payment\uc_credit\uc_credit.module on line 1350.
* You have entered an invalid credit card number.
* warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/London' for '0.0/no DST' instead in C:\xampp\htdocs\UberDrup\profiles\uberdrupal\modules\ubercart\payment\uc_credit\uc_credit.module on line 1347.
* warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/London' for '0.0/no DST' instead in C:\xampp\htdocs\UberDrup\profiles\uberdrupal\modules\ubercart\payment\uc_credit\uc_credit.module on line 1350.

any help would be appreciated