Time slippage

Time slippage or temporal slippage, possibly also called a time slip, (AUDIO: Square One) was a form of temporal distortion. It caused people to experience memories in the wrong order.

Sarah Jane Smith, uncertain whether her experiences with the Doctor and UNIT were taking place in the seventies or the eighties, asked the Third Doctor about it, to which he began explaining: "Temporal slippage. ... My fault, I'm afraid. I think it's currently the 1970s, but —" before he was interrupted by Sam Jones. (PROSE: Interference - Book Two)

The Laan caused time slippage when they travelled through the Time Vortex. (AUDIO: The Sands of Life) K9 was damaged by it, and the Fourth Doctor took a month to repair him. (AUDIO: The Justice of Jalxar, Phantoms of the Deep)

When the TARDIS encountered time slippage, it gave the Eleventh Doctor a premonition of terrible disaster. He tracked the source to the Darkstar Academy. (AUDIO: Darkstar Academy)