diff --git a/modules/Visualization/R/plot_most_likely_terciles_map.R b/modules/Visualization/R/plot_most_likely_terciles_map.R
index abd08f7b4a636898fd4d3c87d154c6eb6d80f83c..5d60f8c1747c8ec8b5435902a3c44107d9a4873f 100644
--- a/modules/Visualization/R/plot_most_likely_terciles_map.R
+++ b/modules/Visualization/R/plot_most_likely_terciles_map.R
@@ -109,7 +109,7 @@ plot_most_likely_terciles <- function(recipe,
                          "\n", "Most Likely Tercile / Initialization: ",
                          i_syear)
       months <- lubridate::month(fcst$attrs$Dates[1, 1, which(start_date == i_syear), ],
-                                 label = T, abb = F)
+                                 label = T, abb = F,locale = "en_GB")
       years <- lubridate::year(fcst$attrs$Dates[1, 1, which(start_date == i_syear), ])
       if (recipe$Analysis$Workflow$Visualization$multi_panel) {
         ## TODO: Ensure this works for daily and sub-daily cases