1\name{date.mdy} 2\alias{date.mdy} 3\title{Convert from Julian Dates to Month, Day, and Year} 4\description{ 5 Convert a vector of Julian dates to a list of vectors with the 6 corresponding values of month, day and year, and optionally weekday. 7} 8\usage{ 9date.mdy(sdate, weekday = FALSE) 10} 11\arguments{ 12 \item{sdate}{a Julian date value, as returned by \code{mdy.date()}, 13 number of days since 1/1/1960.} 14 \item{weekday}{if \code{TRUE}, then the returned list also will 15 contain the day of the week (Sunday=1, Saturday=7).} 16} 17\value{ 18 A list with components \code{month}, \code{day}, and \code{year}. 19} 20\examples{ 21day <- 7 22temp <- date.mdy(mdy.date(month = 7, day = day, year = 1960)) 23## Check for illegal dates, such as 29 Feb in a non leap year 24if (temp$day != day) { 25 cat("Some illegal dates\n") 26} else { 27 cat("All days are legal\n") 28} 29} 30\references{ 31 Press, W. H., Teukolsky, S. A., Vetterling, W. T., and Flannery, 32 B. P. (1992). 33 \emph{Numerical Recipes: The Art of Scientific Computing (Second 34 Edition)}. 35 Cambridge University Press. 36} 37\keyword{chron} 38