diff --git a/scripts/exportlegends.lua b/scripts/exportlegends.lua
index b8c37efde..cc83dbf5f 100644
--- a/scripts/exportlegends.lua
+++ b/scripts/exportlegends.lua
@@ -85,7 +85,7 @@ end
 
 --create an extra legends xml with extra data, by Mason11987 for World Viewer
 function export_more_legends_xml()
-    local julian_day = math.floor(df.global.cur_year_tick / 1200) + 1
+    local julian_day = math.floor(df.global.cur_year_tick / 1200)
     local month = math.floor(julian_day / 28) + 1 --days and months are 1-indexed
     local day = julian_day % 28 + 1
     local year_str = string.format('%0'..math.max(5, string.len(''..df.global.cur_year))..'d', df.global.cur_year)