diff --git a/build.rs b/build.rs
index 7f342ac..fc85708 100644
--- a/build.rs
+++ b/build.rs
@@ -18,6 +18,7 @@ pub struct Locale {
 	long_months: Option<Vec<String>>,
 	short_weekdays: Option<Vec<String>>,
 	long_weekdays: Option<Vec<String>>,
+	ampm: Option<Vec<String>>,
 }
 
 fn main() {
@@ -32,38 +33,8 @@ fn main() {
 				long_months: HashMap::new(),
 				short_weekdays: HashMap::new(),
 				long_weekdays: HashMap::new(),
+				ampm: HashMap::new(),
 			};
-
-			res.short_months.insert(
-				"C".into(),
-				vec!["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
-			);
-
-			res.long_months.insert(
-				"C".into(),
-				vec![
-					"January",
-					"February",
-					"March",
-					"April",
-					"May",
-					"June",
-					"July",
-					"August",
-					"September",
-					"October",
-					"November",
-					"December",
-				],
-			);
-
-			res.short_weekdays
-				.insert("C".into(), vec!["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]);
-
-			res.long_weekdays.insert(
-				"C".into(),
-				vec!["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"],
-			);
 	"#####.as_bytes());
 
 	println!("Building...");
@@ -139,6 +110,20 @@ fn main() {
 					).as_bytes()).unwrap();
 				}
 			}
+
+			if let Some(ampm) = locale_data.ampm {
+				if ampm.len() == 2 {
+					let _ = f.write_all(format!(
+						"res.ampm.insert(\"{}\".into(), vec![{}]);\n",
+						locale_name,
+						ampm
+							.iter()
+							.map(|s| format!("\"{}\"", s))
+							.collect::<Vec<String>>()
+							.join(",")
+					).as_bytes()).unwrap();
+				}
+			}
 		}
 	}
 
diff --git a/locales/en.json b/locales/C.json
similarity index 94%
rename from locales/en.json
rename to locales/C.json
index 1f6e1c4..ee37b53 100644
--- a/locales/en.json
+++ b/locales/C.json
@@ -44,5 +44,9 @@
 		"Friday",
 		"Saturday",
 		"Sunday"
+	],
+	"ampm": [
+		"am",
+		"pm"
 	]
 }
diff --git a/locales/it.json b/locales/it.json
index d94535c..5344723 100644
--- a/locales/it.json
+++ b/locales/it.json
@@ -44,5 +44,9 @@
 		"Venerdí",
 		"Sabato",
 		"Domenica"
+	],
+	"ampm": [
+		"am",
+		"pm"
 	]
 }
diff --git a/src/lib.rs b/src/lib.rs
index e3a3239..194e361 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -191,8 +191,8 @@ where
 					LongMonthName => date.map(|d| write!(w, "{}", long_month(d.month0() as usize, locale))),
 					ShortWeekdayName => date.map(|d| write!(w, "{}", short_weekday(d.weekday().num_days_from_monday() as usize, locale))),
 					LongWeekdayName => date.map(|d| write!(w, "{}", long_weekday(d.weekday().num_days_from_monday() as usize, locale))),
-					LowerAmPm => time.map(|t| write!(w, "{}", if t.hour12().0 { "pm" } else { "am" })),
-					UpperAmPm => time.map(|t| write!(w, "{}", if t.hour12().0 { "PM" } else { "AM" })),
+					LowerAmPm => time.map(|t| write!(w, "{}", ampm(t.hour12().0 as usize, locale))),
+					UpperAmPm => time.map(|t| write!(w, "{}", ampm(t.hour12().0 as usize, locale).to_uppercase())),
 					Nanosecond => time.map(|t| {
 						let nano = t.nanosecond() % 1_000_000_000;
 						if nano == 0 {
@@ -306,3 +306,12 @@ fn long_weekday(day: usize, locale: &str) -> String {
 		.and_then(|res| res.get(day).map(|v| v.to_string()))
 		.unwrap_or_else(|| format!("{}", day))
 }
+
+fn ampm(spec: usize, locale: &str) -> String {
+	locales::LOCALES
+		.ampm
+		.get(locale)
+		.or_else(|| locales::LOCALES.ampm.get("C"))
+		.and_then(|res| res.get(spec).map(|v| v.to_string()))
+		.unwrap_or_else(|| format!("{}", spec))
+}
diff --git a/src/locales.rs b/src/locales.rs
index fee07fa..0504a9c 100644
--- a/src/locales.rs
+++ b/src/locales.rs
@@ -6,6 +6,7 @@ pub struct Locales {
 	pub long_months: HashMap<String, Vec<&'static str>>,
 	pub short_weekdays: HashMap<String, Vec<&'static str>>,
 	pub long_weekdays: HashMap<String, Vec<&'static str>>,
+	pub ampm: HashMap<String, Vec<&'static str>>,
 }
 
 include!(concat!(env!("OUT_DIR"), "/locales.rs"));