depends if you are in the field or not. Basic day in garrison
0500 first call, up and out
0530 PT
0700 release from PT
0830 First formation
0830-1300 work details, lunch, nap. Clean barracks, Weapons maintenence, maybe classes. Motor pool if you have vehicles.
1300 afternoon formation.
1300-1600 or 1630 More of the mornings activities. In the Scout Platoon we had PT again at 1430 or 1500. Road march, swimming, obstacle course stuff.
1600-1630 Final formation, release for the day.

In the field, you are working 24/7. It's hard to pin down. Usually we spent all night on manuvers, and slept during the day.
You might spend all night humping to a new position, dig in, defend the perimeter all day, pull out at night, march all night, and do it again.