diff --git a/stdlib/2and3/calendar.pyi b/stdlib/2and3/calendar.pyi
index b792eb644..2843d46de 100644
--- a/stdlib/2and3/calendar.pyi
+++ b/stdlib/2and3/calendar.pyi
@@ -33,6 +33,9 @@ class Calendar:
     def yeardatescalendar(self, year: int, width: int = ...) -> List[List[int]]: ...
     def yeardays2calendar(self, year: int, width: int = ...) -> List[List[Tuple[int, int]]]: ...
     def yeardayscalendar(self, year: int, width: int = ...) -> List[List[int]]: ...
+    if sys.version_info >= (3, 7):
+        def itermonthdays3(self, year: int, month: int) -> Iterable[Tuple[int, int, int]]: ...
+        def itermonthdays4(self, year: int, month: int) -> Iterable[Tuple[int, int, int, int]]: ...
 
 class TextCalendar(Calendar):
     def prweek(self, theweek: int, width: int) -> None: ...
@@ -67,7 +70,7 @@ class HTMLCalendar(Calendar):
     def formatyearpage(self, theyear: int, width: int = ..., css: Optional[str] = ..., encoding: Optional[str] = ...) -> str: ...
     if sys.version_info >= (3, 7):
         cssclasses: List[str]
-        cssclass_today: str
+        cssclass_noday: str
         cssclasses_weekday_head: List[str]
         cssclass_month_head: str
         cssclass_month: str