calendar computations according to the Roman Catholic liturgical calendar as instituted by MP Mysterii Paschalis of Paul VI (1969) and defined in General Norms for the Liturgical Year and the Calendar and other documents of liturgical legislation.
obtains calendar data from an API
This gem allows you to convert integers to Roman numerals and vice versa.
Ever seen MCMXXXBLAH at the beginning of a movie? Well, now you can find out the year it represents. Also doubles as a nifty tool to count the value of a name by interpreting the letters which are roman numerals and summing their values.