congruence
Validate the structure of Javascript objects using semantic templates. Written as an underscore/lodash mixin.
zeller
Zeller's congruence is an algorithm devised by Christian Zeller to calculate the day of the week for any Julian or Gregorian calendar date.
what-is-the-weekday
Implementing zeller's congruence to discover what is the weekday given a date
bijection
Node.js utility for mapping the properties of two Objects between each other