event_calendar_data : warning: gmdate() [function.gmdate]: Windows does not support dates prior to midnight (00:00:00), January

Getting the following error:

warning: gmdate() [function.gmdate]: Windows does not support dates prior to midnight (00:00:00), January 1, 1970 in C:\webapps\xampp\htdocs\drupal\modules\event\event.module on line 928.

This is in the function, event_calendar_data.

I have a windows server (obviously), and I'm familiar with the issue, but I don't know how to fix it.

Appreciate any help.