This library convert date-string to Wareki (japanese-era) in Elm.
toNengoFromPosix : Time.Posix -> Result String String
This functions convert posix to Wareki(japanese-era):
toNengoFromPosix 0 == "昭和"
toNengoFromPosix 796303523000 == "平成"
toNengoFromPosix 1599909981000 == "令和"
toWarekiFromIsoString : String -> String
This functions convert date-string to Wareki(japanese-era) string:
toWarekiFromIsoString "2020-05-01" == "令和2年5月1日"
toWarekiFromIsoString "hoge" == "Do not exists matched Wareki."