The Clearance Center maintenance schedule:
Sunday 12:45AM to 4:30AM EST/EDT
Tuesday 3:00AM to 6:30AM EST/EDT
Wednesday 3:00AM to 6:30AM EST/EDT
Thursday 3:00AM to 6:30AM EST/EDT
Friday 3:00AM to 6:30AM EST/EDT
Saturday 3:00AM to 6:30AM EST/EDT