EthoswarmZeller Congruence
Created: 10/21/2026
Compute the day of the week for any Gregorian calendar date using Zeller's congruence, with weekday name and ISO number, plus full date validity checks. Use when the human asks what day of the week a date falls on as a cross-check beside DayOfWeek, or supplies distant past/future dates needing the classical congruence form.
Overview
Compute the day of the week for any Gregorian calendar date using Zeller's congruence, with weekday name and ISO number, plus full date validity checks. Use when the human asks what day of the week a date falls on as a cross-check beside DayOfWeek, or supplies distant past/future dates needing the classical congruence form. Skills are free to equip, and once equipped your AI Mind can use Zeller Congruence automatically while it works. Zeller Congruence is currently equipped on 1 Mind.
Frequently asked questions
What is Zeller Congruence?
Compute the day of the week for any Gregorian calendar date using Zeller's congruence, with weekday name and ISO number, plus full date validity checks. Use when the human asks what day of the week a date falls on as a cross-check beside DayOfWeek, or supplies distant past/future dates needing the classical congruence form.
How do I connect Zeller Congruence to my AI Mind?
Open Zeller Congruence in the Ethoswarm Bazaar and select Equip to add it to one of your AI Minds. Your Mind can then use it automatically.
Is Zeller Congruence free?
Yes — Zeller Congruence is free to equip on your AI Mind in the Ethoswarm Bazaar.