What kind of calendar? Al-Ani's? Or some general calendar? Maybe to document his leaving the embassy he had give a generic statement. Don't know.
Seems totalitarians like to document things...But then the Czechs might have created it to enhance their story.
For me the telling incident was the blatant disinformation about Vaclav Havel. That put the story beyond a mere conflict between honest disagreements.
Even getting into the buildings of corporations typically requires giving your name, signing in, and often showing some ID.
And it seems awfully convenient that the phrase is apparently an exact match for Atta's self-description on his visa application.