Module:Date

Documentation for this module may be created at Module:Date/doc

-- A script for Greyhawk calendar conversion.

local cal = {
  ["CY"] = { ahead=0,    name="Common Year"},
  ["OL"] = { ahead=804,  name="Olman Lunar"},
  ["OR"] = { ahead=644,  name="Oeridian Record"},
  ["TC"] = { ahead=1407, name="Touv Calendar"},
  ["FT"] = { ahead=2150, name="Flan Tracking"},
  ["BH"] = { ahead=2659, name="Baklunish Hegira"},
  ["OC"] = { ahead=4462, name="Olven Calendar"},
  ["SD"] = { ahead=5515, name="Suloise Dating"}
}

local p = {}
function p.Date ( frame )
  local year = tonumber(frame.args["year"]) or 1
  local fr   = frame.args["from"] or "CY"
  local to   = frame.args["to"]   or "CY"

  local outdate = cal[to]["ahead"]-cal[fr]["ahead"]

-- Special handling of crossing zero line due to lack of year zero
  if year <= 0 and outdate >= 0 then
    outdate = outdate + 1
  elseif year >= 0 and outdate <= 0 then
    outdate = outdate - 1
  end

  return ( outdate .. "[[" .. cal[to]["name"] .. "|" .. to .. "]]" )
end

return p