diff --git a/RBBGCMuso/R/musoTime.R b/RBBGCMuso/R/musoTime.R
index 2b6cdfc..c29648c 100644
--- a/RBBGCMuso/R/musoTime.R
+++ b/RBBGCMuso/R/musoTime.R
@@ -56,6 +56,12 @@ sumDaysOfPeriod <- function(year, periodlen, corrigated=TRUE){
     }
 }
 
+musoLeapYears <- function(settings){
+    days <- 365*settings$numyears
+    years <- settings$startyear:(settings$startyear+settings$numyears-1)
+    Leapyears <-unlist(lapply(years,isLeapyear)) 
+    return(Leapyears)
+}
 
 musoDate <- function(settings,timestep="d",combined=TRUE, corrigated=TRUE, format="en"){
     ##purpose: generate date label for muso
diff --git a/RBBGCMuso/R/otherUsefullFunctions.R b/RBBGCMuso/R/otherUsefullFunctions.R
index 5165fa0..13f10d0 100644
--- a/RBBGCMuso/R/otherUsefullFunctions.R
+++ b/RBBGCMuso/R/otherUsefullFunctions.R
@@ -51,3 +51,29 @@ supportedMuso <- function(x="outputs"){
         return(cat("Supported formats are ",supportedFormats,"If your fileformat is something else, we automaticle coerced it to csv.\n"))
     }
 }
+
+
+insertRow <- function(existingDF, newrow, r){
+    nr <- nrow(existingDF)
+  existingDF <- rbind(existingDF,rep(NA,ncol(existingDF)))
+  existingDF[seq(r+1,nr+1),] <- existingDF[seq(r,nr),]
+  existingDF[r,] <- newrow
+  existingDF
+}
+
+corrigMuso <- function(settings, data){
+    numdays <- nrow(data)
+    data <- data
+    numyears <- settings$numyears
+    leapyears <- musoLeapYears(settings)
+    sylvesters <- data[seq(from=365, to=numdays, by=365),]
+    ind <- 0
+    for(i in 1:numyears){
+        
+        if(leapyears[i]){
+            data <- insertRow(data,sylvesters[i],i*360+ind)
+            ind <- ind+1
+        }
+    }
+    return(data)
+}
diff --git a/RBBGCMuso/R/rungetMuso.R b/RBBGCMuso/R/rungetMuso.R
index 4fb3bca..ed0b1e1 100644
--- a/RBBGCMuso/R/rungetMuso.R
+++ b/RBBGCMuso/R/rungetMuso.R
@@ -6,7 +6,7 @@
 
 Linuxp <-(Sys.info()[1]=="Linux")
 
-rungetMuso <- function(settings, timee="d", debugging=FALSE, logfilename=NULL, keepEpc=FALSE, export=FALSE, silent=FALSE, aggressive=FALSE){
+rungetMuso <- function(settings, timee="d", debugging=FALSE, logfilename=NULL, keepEpc=FALSE, export=FALSE, silent=FALSE, aggressive=FALSE, leapYear=FALSE){
 
 #############################################################
 ############################spinup run############################
@@ -194,6 +194,13 @@ rungetMuso <- function(settings, timee="d", debugging=FALSE, logfilename=NULL, k
             colnames(Reva) <- unlist(settings$outputvars[[2]])
     }
 
+    if(leapYear){
+        Reva <- corrigMuso(settings,Reva)
+         rownames(Reva) <- musoDate(settings)
+     } else { 
+         rownames(Reva) <- musoDate(settings, corrigated=FALSE)
+    }
+
     if(export!=FALSE){
         setwd(whereAmI)
 
@@ -204,7 +211,7 @@ rungetMuso <- function(settings, timee="d", debugging=FALSE, logfilename=NULL, k
                   
             
         ## )
-
+        write.csv(Reva,export)
         
     } else{
         setwd(whereAmI)