diff --git a/rules/preprocessing.snakefile b/rules/preprocessing.snakefile
index 70b70a5b..7f31991f 100644
--- a/rules/preprocessing.snakefile
+++ b/rules/preprocessing.snakefile
@@ -1,7 +1,8 @@
 rule download_participants:
     params:
         group = config["DOWNLOAD_PARTICIPANTS"]["GROUP"],
-        ignored_device_ids = config["DOWNLOAD_PARTICIPANTS"]["IGNORED_DEVICE_IDS"]
+        ignored_device_ids = config["DOWNLOAD_PARTICIPANTS"]["IGNORED_DEVICE_IDS"],
+        timezone = config["TIMEZONE"]
     script:
         "../src/data/download_participants.R"
 
diff --git a/src/data/download_participants.R b/src/data/download_participants.R
index 05e4bd86..a067d08b 100644
--- a/src/data/download_participants.R
+++ b/src/data/download_participants.R
@@ -4,21 +4,26 @@ library(RMySQL)
 
 group <- snakemake@params[["group"]]
 ignored_device_ids <- snakemake@params[["ignored_device_ids"]]
+timezone <- snakemake@params[["timezone"]]
 rmysql.settingsfile <- "./.env"
 
 stopDB <- dbConnect(MySQL(), default.file = rmysql.settingsfile, group = group)
-query <- paste0("SELECT device_id, brand FROM aware_device order by timestamp asc")
+query <- "SELECT device_id, brand, label, timestamp FROM aware_device order by timestamp asc"
 participants <- dbGetQuery(stopDB, query)
 pids <- c()
 
+end_date <- format(Sys.Date(), "%Y/%m/%d")
+
 for(id in 1:nrow(participants)){
     device_id <- participants$device_id[[id]]
     brand <- ifelse(participants$brand[[id]] == "iPhone", "ios", "android")
+    label <- ifelse(participants$label[[id]] == "", "EMPTY_LABEL", participants$label[[id]])
+    start_date <- format(as.POSIXct(participants$timestamp[[id]] / 1000, origin = "1970-01-01", tz = timezone), "%Y/%m/%d")
     if(!(device_id %in% ignored_device_ids)){
         pid <- paste0("p", ifelse(id < 10, paste0("0", id), id))
         pids <- append(pids, pid)
         file_connection <- file(paste0("./data/external/", pid))
-        writeLines(c(device_id, brand), file_connection)
+        writeLines(c(device_id, brand, label, paste0(start_date, ",", end_date)), file_connection)
         close(file_connection)
     }
 }