From c8dd82a5e082b88c7093423eb2bfabebfde6ec4f Mon Sep 17 00:00:00 2001
From: Greg Burri <greg.burri@gmail.com>
Date: Sat, 19 Apr 2025 13:53:09 +0200
Subject: [PATCH] Add support for first day of the week based on territory

---
 backend/src/translation.rs | 53 +++++++++++++++++++++++++++++++++++---
 1 file changed, 50 insertions(+), 3 deletions(-)

diff --git a/backend/src/translation.rs b/backend/src/translation.rs
index ce7c6ba..6bced76 100644
--- a/backend/src/translation.rs
+++ b/backend/src/translation.rs
@@ -210,9 +210,56 @@ impl Tr {
     // Return the first day of the week for the current language.
     // See https://en.wikipedia.org/wiki/Week#First_day_of_the_week.
     pub fn first_day_of_week(&self) -> Weekday {
-        match (self.lang.code.as_ref(), self.lang.territory.as_ref()) {
-            // TODO: Add more languages: https://en.wikipedia.org/wiki/Week.
-            ("en", "US") => Weekday::Sun,
+        match self.lang.territory.as_ref() {
+            "US" // United States.
+            | "AR" // Argentina.
+            | "BZ" // Belize.
+            | "BO" // Bolivia.
+            | "BR" // Brazil.
+            | "CA" // Canada.
+            | "CL" // Chile.
+            | "CN" // China.
+            | "CO" // Colombia.
+            | "CR" // Costa Rica.
+            | "DO" // Dominican Republic.
+            | "EC" // Ecuador.
+            | "SV" // El Salvador.
+            | "GT" // Guatemala.
+            | "HN" // Honduras.
+            | "HK" // Hong Kong.
+            | "IL" // Israel.
+            | "JM" // Jamaica.
+            | "JP" // Japan.
+            | "KE" // Kenya.
+            | "MO" // Macao.
+            | "MX" // Mexico.
+            | "NI" // Nicaragua.
+            | "PA" // Panama.
+            | "PE" // Peru.
+            | "PH" // Philippines.
+            | "PR" // Puerto Rico.
+            | "ZA" // South Africa.
+            | "KR" // South Korea.
+            | "TW" // Taiwan.
+            | "VE" // Venezuela.
+            | "ZW" // Zimbabwe.
+            => Weekday::Sun,
+            "AF" // Afghanistan.
+            | "DZ" // Algeria.
+            | "BH" // Bahrain.
+            | "EG" // Egypt.
+            | "IR" // Iran.
+            | "IQ" // Iraq.
+            | "JO" // Jordan.
+            | "KW" // Kuwait.
+            | "LY" // Libya.
+            | "OM" // Oman.
+            | "QA" // Qatar.
+            | "SA" // Saudi Arabia.
+            | "SY" // Syria.
+            | "AE" // United Arab Emirates.
+            | "YE" // Yemen.
+            => Weekday::Sat,
             _ => Weekday::Mon,
         }
     }