diff --git a/DESCRIPTION b/DESCRIPTION
index 3ff2960b50ad7a84eb2c26fc83d8a6f74bf95845..87f29d14644eeb820c88c5dfc9596897aa453a03 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: airGRteaching
 Type: Package
 Title: Teaching Hydrological Modelling with the GR Rainfall-Runoff Models ('Shiny' Interface Included)
-Version: 0.2.10.6
+Version: 0.2.10.7
 Date: 2020-04-14
 Authors@R: c(
   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 37894189abffa0f6a8b9c2a57784e973c2ebaf26..a23b990fd72f329df36d29350d0cdc71e9d3e13c 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -4,7 +4,7 @@
 
 
 
-### 0.2.10.6 Release Notes (2020-04-14)
+### 0.2.10.7 Release Notes (2020-04-14)
 
 
 #### New features
diff --git a/inst/ShinyGR/server.R b/inst/ShinyGR/server.R
index dc50bacdfb4748bc287197a6fc2a6efee38e43d5..8f1bfb051de952aad2d219f3d89b128182124517 100644
--- a/inst/ShinyGR/server.R
+++ b/inst/ShinyGR/server.R
@@ -548,14 +548,15 @@ shinyServer(function(input, output, session) {
                       min = as.POSIXct(.ShinyGR.args$SimPer[[input$Dataset]][1L], tz = "UTC"),## + .TypeModelGR(input$HydroModel)$TimeLag,
                       max = as.POSIXct(.ShinyGR.args$SimPer[[input$Dataset]][2L], tz = "UTC"),
                       value = as.POSIXct(.ShinyGR.args$SimPer[[input$Dataset]][1L], tz = "UTC"), + .TypeModelGR(input$HydroModel)$TimeLag,
-                      timeFormat = "%F", timezone = "+0000")
+                      timeFormat = timeFormat, timezone = "+0000")
   })
   observe({
+    timeFormat <- ifelse(input$HydroModel == "GR2M", "%Y-%m", "%F")
     updateSliderInput(session, inputId = "Event", label = "Select the target date:",
                       min = input$Period[1L],## + .TypeModelGR(input$HydroModel)$TimeLag,
                       max = input$Period[2L],
-                      timeFormat = "%F", timezone = "+0000")
-  })
+                      timeFormat = timeFormat, timezone = "+0000")
+  }, priority = -100)
   
   
   ## Graphical parameters