Calendar calculation: the weekday of any date, World Cup rules
How it works
A date appears, written like 08-12-1721 (day, month, year). Name its weekday as fast as you can: keys 1 to 7 stand for Monday to Sunday. The round lasts one minute.
Scoring
Dates run from 1600 to 2100. Your score is the number of right answers before your second mistake, as in the World Cup rules.
For reference
The winning calendar score at the 2024 Mental Calculation World Cup was 100.
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