diff --git a/lib/pure/times.nim b/lib/pure/times.nim
index 1a3dc7512f..da130d35e1 100644
--- a/lib/pure/times.nim
+++ b/lib/pure/times.nim
@@ -1631,7 +1631,7 @@ const
         "Sunday"],
   )
 
-  FormatLiterals = {' ', '-', '/', ':', '(', ')', '[', ']', ','}
+  FormatLiterals = {' ', '-', '/', ':', '(', ')', '[', ']', ',', '.'}
 
 proc `$`*(f: TimeFormat): string =
   ## Returns the format string that was used to construct `f`.