From c69f0615d4ddf11fc6742c2716e777366e8fc477 Mon Sep 17 00:00:00 2001
From: dorian-faerber <d.faerber@dr-flex.de>
Date: Thu, 15 Jan 2026 16:16:48 +0100
Subject: [PATCH] feat: "serde" feature flag

---
 Cargo.toml      | 6 +++++-
 src/holidays.rs | 1 +
 src/regions.rs  | 2 +-
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 68b79cd..8b722c4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,11 @@ keywords = ["holiday", "Germany", "Feiertage"]
 [dependencies]
 chrono = "0.4"
 computus = "1.0.0"
-
+serde = { version = "1.0", features = ["derive"], optional = true }
 
 [dev-dependencies]
 proptest = "0.9.1"
+
+[features]
+default = []
+serde = ["dep:serde"]
diff --git a/src/holidays.rs b/src/holidays.rs
index 920167b..34d92bd 100644
--- a/src/holidays.rs
+++ b/src/holidays.rs
@@ -7,6 +7,7 @@ use computus;
 /// For public holidays use `GermanRegion` instead, since
 /// public holidays differ from region to region.
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub enum GermanHoliday {
     Neujahr,
     HeiligeDreiKoenige,
diff --git a/src/regions.rs b/src/regions.rs
index ff1e05b..6f65026 100644
--- a/src/regions.rs
+++ b/src/regions.rs
@@ -5,6 +5,7 @@ use chrono::{Datelike, NaiveDate};
 /// Holidays guaranteed to take place on sundays, e.g. easter sunday, are excluded by default.
 /// However, holidays with a fixed date can still fall on a sunday.
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub enum GermanRegion {
     BadenWuerttemberg,
     /// * The Augsburger Friedensfest only applies to Augsburg.
@@ -238,5 +239,4 @@ mod tests {
         assert!(BadenWuerttemberg.holidays_in_year(year).is_empty());
     }
     }
-
 }