Scala library for converting AD date (西元) to Lunar date (農曆) and back.
Fully converted from JavaChineseCalendar and tested against it. Modified to extend available years range to 1900 to 2099.
Available for 2.11, 2.12 and 2.13. Support ScalaJs for 2.12 and 2.13
Add to build.sbt
//scala
libraryDependencies += "org.lunaspeed" %% "lunar4s" % "1.1.1"
//scalajs
libraryDependencies += "org.lunaspeed" %%% "lunar4s" % "1.1.1"
Usage:
import java.time.LocalDateTime
import org.lunaspeed.lunar4s.LunarDate._
val dt = LocalDateTime.now().withYear(2024).withMonth(11).withDayOfMonth(1).withHour(15)
//to lunar date
val lunarDate = dt.toLunar() match {
case Right(d) => d
case Left(e) =>
println("something went wrong when converting to lunar date, ")
throw e
}
//if don't want to worry about exception
val unsafeLunarDate = dt.toLunarUnsafe()
//back to LocalDate
val localDate = lunarDate.toLocalDate() match {
case Right(d) => d
case Left(e) =>
println("something went wrong when converting to AD date, ")
throw e
}
24 Solar Terms (24節氣)
Currently, only support 21st century.
import org.lunaspeed.lunar4s.SolarTerms
SolarTerms.termAsDate(2017, SolarTerms.SpringCommences)
// Some(LocalDate.of(2017, 2,3))
//get all Solar Terms in one year
SolarTerms.getYearTerms(2017): Map[SolarTerm, LocalDate]
JavaScript
import { LunarDate } from 'lunar4s-opt'
const lunarDate = LunarDate.toLunar(new Date())- Add i18n for Stem and Branch
Cross compile for 2.11