Time Zone Converter

Purpose: This tool computes the local time in a target country given a source date/time and two IANA time zone identifiers. It serves travelers, distributed teams, schedulers, and educators coordinating across borders.
Conceptually, it maps each zone to UTC, applies daylight saving rules for the specified date, and returns the target local time with its UTC offset. It normalizes inputs, validates zone names, and formats outputs in ISO 8601 with offset.
Who benefits: anyone planning meetings, travel itineraries, or deadlines across time zones, including teams spread across continents and students arranging assignments with instructors in different regions. Unique value: automatic DST handling, robust validation, clear offset information, and precise cross-country scheduling support.
Core features: required inputs (source_zone, target_zone, date_time optional); internal tz lookup; delta calculation; formatted output; error codes for unknown zones or invalid dates. Optional/advanced: support for multiple input formats and current-time default when date_time omitted. Use cases: scheduling a 9:00 AM in Tokyo for a team in New York; planning a flight connection; comparing deadlines across regions.