Template:Year article header/zc
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| File:Ambox warning yellow.svg | This template employs intricate features of template syntax.
You are encouraged to familiarise yourself with its setup and parser functions before editing the template. If your edit causes unexpected problems, please undo it quickly, as this template may appear on a large number of pages. You can conduct experiments, and should test all major changes, in either this template's sandbox, your own user sandbox, or the general template sandbox, before changing anything. |
This template is used by Template:Year article header to compute Zeller's congruence to determine if a year is a common or leap year, a leap year being divisible by 4 and not divisible by 100, or divisible by 100 and 400, and to indicate which day of the week it starts on and the year type (exceptional, leap, or common).