// Time zone database interface for calendar operations pub type TimeZoneDatabase { TimeZoneDatabase } pub type TimeZoneInfo { TimeZoneInfo(abbreviation: String, utc_offset: Int, std_offset: Int) } pub type TimeZoneError { TimeZoneNotFound InvalidTimeZone } pub fn get_time_zone_info( _database: TimeZoneDatabase, _time_zone: String, ) -> Result(TimeZoneInfo, TimeZoneError) { // Default UTC timezone info Ok(TimeZoneInfo(abbreviation: "UTC", utc_offset: 0, std_offset: 0)) } pub fn list_time_zones(_database: TimeZoneDatabase) -> List(String) { ["UTC"] }