[Resettozero]

what is the purpose for this at the last hour?

Not 12:01 AM.

Effective 12:01 PM, January 20th.

Regardless the timing of the oath-taking ceremony, Donald John Trump is President of the United States of America at 12 Noon and Barry Soetoro is not.

The Trump Administration is relieving the Commander of his duties officially at that time. Just giving him a heads-up.

[Steve_Seattle]

"The Trump Administration is relieving the Commander of his duties officially at that time. Just giving him a heads-up."

Wrong. He was removed by Obama. Trump currently has no authority to do this, and he cannot issue orders in advance.