diff --git a/translations/ar.json b/translations/ar.json
index 26753ab7..29003cdb 100644
--- a/translations/ar.json
+++ b/translations/ar.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/ca.json b/translations/ca.json
index 6d9236b6..13025d58 100644
--- a/translations/ca.json
+++ b/translations/ca.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/cy.json b/translations/cy.json
index aae587ff..339b3afc 100644
--- a/translations/cy.json
+++ b/translations/cy.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/de.json b/translations/de.json
index f501dde4..70dc2b63 100644
--- a/translations/de.json
+++ b/translations/de.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/en.json b/translations/en.json
index a05f9517..17911d92 100644
--- a/translations/en.json
+++ b/translations/en.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/es.json b/translations/es.json
index 0a56ba3c..67b2195e 100644
--- a/translations/es.json
+++ b/translations/es.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/fr.json b/translations/fr.json
index 1d3685ae..d37da2a2 100644
--- a/translations/fr.json
+++ b/translations/fr.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/ga.json b/translations/ga.json
index f9c7de5c..b3abecb7 100644
--- a/translations/ga.json
+++ b/translations/ga.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/hi.json b/translations/hi.json
index 858b57c9..73cc8f65 100644
--- a/translations/hi.json
+++ b/translations/hi.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/it.json b/translations/it.json
index 51f392d7..deef1c41 100644
--- a/translations/it.json
+++ b/translations/it.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/ja.json b/translations/ja.json
index f053670b..46460713 100644
--- a/translations/ja.json
+++ b/translations/ja.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/oc.json b/translations/oc.json
index 85623d90..f6b3aa37 100644
--- a/translations/oc.json
+++ b/translations/oc.json
@@ -189,5 +189,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/pt.json b/translations/pt.json
index e5acd15d..97716df7 100644
--- a/translations/pt.json
+++ b/translations/pt.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/ru.json b/translations/ru.json
index f14be995..5b361b35 100644
--- a/translations/ru.json
+++ b/translations/ru.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/translations/zh.json b/translations/zh.json
index 71f517f2..036b5cab 100644
--- a/translations/zh.json
+++ b/translations/zh.json
@@ -193,5 +193,7 @@
     "Ask a question": "Ask a question",
     "Possible answers": "Possible answers",
     "replying to": "replying to",
-    "announces": "announces"
+    "announces": "announces",
+    "Previous month": "Previous month",
+    "Next month": "Next month"
 }
diff --git a/webinterface.py b/webinterface.py
index d2cd1284..975370d4 100644
--- a/webinterface.py
+++ b/webinterface.py
@@ -3483,11 +3483,11 @@ def htmlCalendar(translate: {}, \
     calendarStr+='<main><table class="calendar">\n'
     calendarStr+='<caption class="calendar__banner--month">\n'
     calendarStr+='  <a href="'+actor+'/calendar?year='+str(prevYear)+'?month='+str(prevMonthNumber)+'">'
-    calendarStr+='  <img loading="lazy" src="/'+iconsDir+'/prev.png" class="buttonprev"/></a>\n'
+    calendarStr+='  <img loading="lazy" alt="'+translate['Previous month']+'" title="'+translate['Previous month']+'" src="/'+iconsDir+'/prev.png" class="buttonprev"/></a>\n'
     calendarStr+='  <a href="'+actor+'/inbox">'
     calendarStr+='  <h1>'+monthName+'</h1></a>\n'
     calendarStr+='  <a href="'+actor+'/calendar?year='+str(nextYear)+'?month='+str(nextMonthNumber)+'">'
-    calendarStr+='  <img loading="lazy" src="/'+iconsDir+'/prev.png" class="buttonnext"/></a>\n'
+    calendarStr+='  <img loading="lazy" alt="'+translate['Next month']+'" title="'+translate['Next month']+'" src="/'+iconsDir+'/prev.png" class="buttonnext"/></a>\n'
     calendarStr+='</caption>\n'
     calendarStr+='<thead>\n'
     calendarStr+='<tr>\n'