diff --git a/DESCRIPTION b/DESCRIPTION
index a858825..652c971 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: LightLogR
 Title: Work With Data from Wearable Light Loggers and Optical Radiation Dosimeters
-Version: 0.3.5
+Version: 0.3.6
 Authors@R: c(
     person("Johannes", "Zauner", 
       email = "johannes.zauner@tum.de", role = c("aut", "cre"),
diff --git a/NEWS.md b/NEWS.md
index 3a39927..dc69d6d 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,7 @@
+# LightLogR 0.3.6
+
+* `bright_dark_period()` now maintains the date when looping the data.
+
 # LightLogR 0.3.5
 
 * Added the function `aggregate_Date()` to aggregate long datasets to one day per group.
diff --git a/R/metric_bright_dark_period.R b/R/metric_bright_dark_period.R
index 63d49f8..ffb481d 100755
--- a/R/metric_bright_dark_period.R
+++ b/R/metric_bright_dark_period.R
@@ -57,7 +57,7 @@
 #'   dplyr::reframe(bright_dark_period(MEDI, Datetime, "brightest", "10 hours",
 #'     as.df = TRUE))
 #' dataset1 %>%
-#'   dplyr::reframe(bright_dark_period(MEDI, Datetime, "darkest", "5 hours",
+#'   dplyr::reframe(bright_dark_period(MEDI, Datetime, "darkest", "7 hours",
 #'     loop = TRUE, as.df = TRUE))
 #' 
 #' # Dataset with duration as Time.vector
@@ -125,8 +125,7 @@ bright_dark_period <- function(Light.vector,
   # Loop data
   if (loop) {
     Light.vector <- c(Light.vector, Light.vector)
-    span <- dplyr::last(Time.vector) - Time.vector[1]
-    Time.vector <- c(Time.vector, Time.vector + span + epoch)
+    Time.vector <- c(Time.vector, Time.vector)
   }
 
   # Calculate window size