Every model was told to write IDK rather than guess. These are the date questions about events after each model's cutoff (the stated one where its maker publishes it, otherwise the estimate from the chart), split by what it did.
For every dated answer, the model's month minus the true month. Left of zero is too early, right is too late; misses beyond two years are piled at the ends.
Date questions no model got to the month and most dated two or more months off, with the date the timeline gives and the source it cites.