Add format_localized for chrono::naive::NaiveDate

src/format/strftime.rs

@@ -663,7 +663,7 @@ fn test_strftime_docs() {
 #[cfg(feature = "unstable-locales")]
 #[test]
 fn test_strftime_docs_localized() {
-    use crate::{FixedOffset, TimeZone};
+    use crate::{FixedOffset, NaiveDate, TimeZone};
 
     let dt = FixedOffset::east_opt(34200).unwrap().ymd_opt(2001, 7, 8).unwrap().and_hms_nano(
         0,
@@ -696,4 +696,17 @@ fn test_strftime_docs_localized() {
         dt.format_localized("%c", Locale::fr_BE).to_string(),
         "dim 08 jui 2001 00:34:60 +09:30"
     );
+
+    let nd = NaiveDate::from_ymd_opt(2001, 7, 8).unwrap();
+
+    // date specifiers
+    assert_eq!(nd.format_localized("%b", Locale::de_DE).to_string(), "Jul");
+    assert_eq!(nd.format_localized("%B", Locale::de_DE).to_string(), "Juli");
+    assert_eq!(nd.format_localized("%h", Locale::de_DE).to_string(), "Jul");
+    assert_eq!(nd.format_localized("%a", Locale::de_DE).to_string(), "So");
+    assert_eq!(nd.format_localized("%A", Locale::de_DE).to_string(), "Sonntag");
+    assert_eq!(nd.format_localized("%D", Locale::de_DE).to_string(), "07/08/01");
+    assert_eq!(nd.format_localized("%x", Locale::de_DE).to_string(), "08.07.2001");
+    assert_eq!(nd.format_localized("%F", Locale::de_DE).to_string(), "2001-07-08");
+    assert_eq!(nd.format_localized("%v", Locale::de_DE).to_string(), " 8-Jul-2001");
 }

src/naive/date.rs

@@ -14,6 +14,10 @@ use num_traits::ToPrimitive;
 #[cfg(feature = "rkyv")]
 use rkyv::{Archive, Deserialize, Serialize};
 
+/// L10n locales.
+#[cfg(feature = "unstable-locales")]
+use pure_rust_locales::Locale;
+
 #[cfg(any(feature = "alloc", feature = "std", test))]
 use crate::format::DelayedFormat;
 use crate::format::{parse, write_hundreds, ParseError, ParseResult, Parsed, StrftimeItems};
@@ -1144,6 +1148,37 @@ impl NaiveDate {
         self.format_with_items(StrftimeItems::new(fmt))
     }
 
+    /// Formats the date with the specified formatting items and locale.
+    #[cfg(feature = "unstable-locales")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "unstable-locales")))]
+    #[inline]
+    pub fn format_localized_with_items<'a, I, B>(
+        &self,
+        items: I,
+        locale: Locale,
+    ) -> DelayedFormat<I>
+    where
+        I: Iterator<Item = B> + Clone,
+        B: Borrow<Item<'a>>,
+    {
+        DelayedFormat::new_with_locale(Some(*self), None, items, locale)
+    }
+
+    /// Formats the date with the specified format string and locale.
+    ///
+    /// See the [`crate::format::strftime`] module on the supported escape
+    /// sequences.
+    #[cfg(feature = "unstable-locales")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "unstable-locales")))]
+    #[inline]
+    pub fn format_localized<'a>(
+        &self,
+        fmt: &'a str,
+        locale: Locale,
+    ) -> DelayedFormat<StrftimeItems<'a>> {
+        self.format_localized_with_items(StrftimeItems::new_with_locale(fmt, locale), locale)
+    }
+
     /// Returns an iterator that steps by days across all representable dates.
     ///
     /// # Example