A parser for date values as they are used for start_date and similar tags.

npm install --save openstreetmap-date-parser

• openstreetmap-date-format: format a date string into a human readable string (several languages available)
• openstreetmap-date-query: builds a regexp from a date query, e.g. for usage with Overpass API.

It will return an array with the lower and upper boundaries for the year in which the event took place.

var osmDateParser = require('openstreetmap-date-parser')

console.log(osmDateParser('1984-10-20'))
// [ 1984, 1984 ]

console.log(osmDateParser('1914..1918'))
// [ 1914, 1918 ]

console.log(osmDateParser('early 1920s'))
// [ 1920, 1923 ]

console.log(osmDateParser('before 1855'))
// [ null, 1854 ]