diff --git a/DESCRIPTION b/DESCRIPTION
index 8b9a3c26d3d14d27e7ffd5f6165ffb551567dc92..01382f947663a53965fdacf6b4f37108ee1f0506 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Package: airGR
 Type: Package
 Title: Suite of GR Hydrological Models for Precipitation-Runoff Modelling
-Version: 1.4.4.18
-Date: 2020-04-09
+Version: 1.4.4.19
+Date: 2020-04-10
 Authors@R: c(
   person("Laurent", "Coron", role = c("aut", "trl"), comment = c(ORCID = "0000-0002-1503-6204")),
   person("Olivier", "Delaigue", role = c("aut", "cre"), comment = c(ORCID = "0000-0002-7668-8468"), email = "airGR@inrae.fr"),
diff --git a/NEWS.md b/NEWS.md
index d62bd6b94189375ec22328a81c0a93e4ffe0093f..16ef4ca68c18db9a05199e99518e1f7acd579fce 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -4,7 +4,7 @@
 
 
 
-### 1.4.4.18 Release Notes (2020-04-09)
+### 1.4.4.19 Release Notes (2020-04-10)
 
 #### New features
 
diff --git a/R/SeriesAggreg2.R b/R/SeriesAggreg2.R
index 412029943eaee2ea9677d8b78a9e7873aacd7379..9e2a7aac9581c72d29684eadde4047d5bbc7c79b 100644
--- a/R/SeriesAggreg2.R
+++ b/R/SeriesAggreg2.R
@@ -1,8 +1,24 @@
-SeriesAggreg2 <- function(TabSeries, Format, ConvertFun,
+SeriesAggreg2 <- function(TabSeries, Format, TimeFormat, NewTimeFormat, ConvertFun,
                           YearFirstMonth = 1, TimeLag = 0, verbose = TRUE) {
   
-  ## Arguments_check
-  
+  ## Arguments checks
+  if (!missing(TimeFormat)) {
+    warning("deprecated 'TimeFormat' argument", call. = FALSE)
+  }
+  if (!missing(NewTimeFormat)) {
+    if (missing(Format)) {
+      Format <- switch(NewTimeFormat,
+                       hourly  = "%Y%m%d%h",
+                       daily   = "%Y%m%d",
+                       monthly = "%Y%m",
+                       yearly  = "%Y")
+      msgNewTimeFormat <- sprintf(" 'Format' automatically set to %s", sQuote(Format))
+    } else {
+      msgNewTimeFormat <- NULL
+    }
+    warning("deprecated 'NewTimeFormat' argument: please use 'Format' instead.",
+            msgNewTimeFormat, call. = FALSE)
+  }
   ## check TabSeries
   if (!is.data.frame(TabSeries)) {
     stop("'TabSeries' must be a data.frame containing the dates and data to be aggregated")