Template:Dash year/doc

Usage
This template converts a single year into an en-dashed range, abbreviating the second year to two digits whenever possible.
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{	"params": { "1": {			"label": "Start year", "description": "Year the date range began", "example": "1420", "type": "number", "required": true },		"2": {			"label": "End year", "description": "Year the date range ended", "example": "2069", "type": "number", "suggested": true },		"range": { "label": "Duration", "description": "Length in years of the year range", "example": "10", "type": "number", "suggested": true }	},	"description": "Creates a dashed year range, either from start year to end year (if specified), start year + duration (if specified), or start year + 1 (if neither is specified)" }