Historical Dates

Master: 
Develop: 

JavaScript/TypeScript library for converting/calculating Roman and Easter dates. Based on Axel Findling's Roman date converter and Nikolaus A. Bär's easter date calculator.

Get Started

``
npm install historical-dates
`

Determining the dates of Easter

`typescript
import { calcEaster } from 'historical-dates';

let easter = calcEaster(1400, 'julian');
console.log(easter.sunday);
// 1400-4-18 (Julian)
`

Parsing Roman dates

`typescript
import { RomanDate } from 'historical-dates';

let romanDate = RomanDate.fromString('prid kal. mar mdc', 'gregorian');
console.log(romanDate);
// pridie Kal. Mart. MDC
console.log(romanDate.toDate());
// 1600-2-28
`

Converting Julian and Gregorian dates

`typescript
import { createDate } from 'historical-dates';

let julianDate = createDate(1582, 10, 5, 'julian');
let gregorianDate = julianDate.toGregorian();
console.log(gregorianDate);
// 1582-10-15
``