Until Feb 17, when trackwork ends, the Crescent is not running south of Atlanta Monday-Thursday. The Friday-Sunday runs may be significantly delayed due to freight congestion. Call Amtrak before heading to the station.
If you're referring to the Crescent that would be traveling between CVS and WAS today. It was well over four hours late. If you want to know about tomorrow. It's best to wake up and check with Amtrak. It's to early to predict it's OTP. He could fall behind overnight and you would show up at CVS on time and the train be three hours late. So check with Amtrak.