try getting fresh tzdb

Author: rok

cpp/src/arrow/util/chrono_internal.h

@@ -135,6 +135,16 @@ constexpr ToDuration trunc(const std::chrono::duration<Rep, Period>& d) {
   return std::chrono::floor<ToDuration>(d);
 }
 
+// Timezone database version detection
+inline std::string get_tzdb_version() {
+  try {
+    const auto& db = std::chrono::get_tzdb();
+    return db.version;
+  } catch (...) {
+    return "unknown";
+  }
+}
+
 // Timezone lookup
 inline const time_zone* locate_zone(std::string_view tz_name) {
   return std::chrono::locate_zone(tz_name);
@@ -343,6 +353,16 @@ using vendored::floor;
 using vendored::round;
 using vendored::trunc;
 
+// Timezone database version detection
+inline std::string get_tzdb_version() {
+  try {
+    const auto& db = vendored::get_tzdb();
+    return db.version;
+  } catch (...) {
+    return "unknown";
+  }
+}
+
 // Timezone lookup
 inline const time_zone* locate_zone(std::string_view tz_name) {
   return vendored::locate_zone(std::string(tz_name));