Does anyone know at what time tier 2 the dragon ball collection period starts and end in Florida?

First of all since you didn't say which version you play I'm just going to assume it's Taiwan. It's not too hard to figure out the times, you just have to do some basic math (addition/subtraction).

Step 1: Check the times on this thread and then have a look at the clock just above the first post.http://www.dbocom.com/forum/showthread.php?t=6579

Step 2: Compare the time on the clock at the top of the thread with the current time in Florida and calculate the difference.

Step 3: Subtract the difference from the hunt times listed in the thread and you will get the hunt times for Florida.

Thank you so much :D
looks like i gotta wake up early since its a 12 hour difference x.x

No problem.

Also, in case you didn't notice there are two hunts per day, so if one of them is too early you might be able to do the other one.