diff --git a/components/calendar/src/types.rs b/components/calendar/src/types.rs
index b27e9f43292..bee73d86a4e 100644
--- a/components/calendar/src/types.rs
+++ b/components/calendar/src/types.rs
@@ -180,7 +180,7 @@ impl FormattingEra {
 }
 
 /// Year information for a year that is specified with an era
-#[derive(Copy, Clone, Debug, PartialEq)]
+#[derive(Copy, Clone, Debug, PartialEq, Default)]
 #[non_exhaustive]
 pub struct EraYear {
     /// The era code as used in formatting. This era code is not necessarily unique for the calendar, and
@@ -202,7 +202,7 @@ pub struct EraYear {
 }
 
 /// Year information for a year that is specified as a cyclic year
-#[derive(Copy, Clone, Debug, PartialEq)]
+#[derive(Copy, Clone, Debug, PartialEq, Default)]
 #[non_exhaustive]
 pub struct CyclicYear {
     /// The year in the cycle.
@@ -316,7 +316,7 @@ impl fmt::Display for MonthCode {
 
 /// Representation of a formattable month.
 #[derive(Copy, Clone, Debug, PartialEq)]
-#[allow(clippy::exhaustive_structs)] // this type is stable
+#[non_exhaustive]
 pub struct MonthInfo {
     /// The month number in this given year. For calendars with leap months, all months after
     /// the leap month will end up with an incremented number.
@@ -355,9 +355,10 @@ impl MonthInfo {
         self.standard_code.parsed().map(|(_, l)| l).unwrap_or(false)
     }
 }
+
 /// A struct containing various details about the position of the day within a year. It is returned
-// by the [`day_of_year_info()`](trait.DateInput.html#tymethod.day_of_year_info) method of the
-// [`DateInput`] trait.
+/// by the [`day_of_year_info()`](trait.DateInput.html#tymethod.day_of_year_info) method of the
+/// [`DateInput`] trait.
 #[derive(Copy, Clone, Debug, PartialEq)]
 #[allow(clippy::exhaustive_structs)] // this type is stable
 pub struct DayOfYearInfo {