Cannot access admin panel to address errors

Two warning messages pop up after I submit my log in info. They prevent me from even seeing the admin panel.

Warning: gettimeofday() [function.gettimeofday]: It is not safe to rely on the system's timezone settings....We selected 'America/New_York' for 'EDT/-4.0/DST' instead in /-----/----/public_html/gallery/modules/core/classes/GallerySession.class on line 1391

Warning: Cannot modify header information - headers already sent by (output started at /-----/----/public_html/gallery/modules/core/classes/GallerySession.class:1391) in /-----/----/public_html/gallery/modules/core/classes/GalleryPhpVm.class on line 124

I don't know where to go from here.