Time Zone Converter

Purpose & User Intent: This tool performs precise time zone conversion from Israel to India, handling daylight saving time where applicable. Target users are travelers, remote teams, schedulers, and event planners who must align meetings and deployments across Asia/Jerusalem and Asia/Kolkata. The problem solved is converting a local Israel date/time to the corresponding India time, preserving date boundaries and enabling automated processing by returning a machine-readable timestamp and offset information. Core Logic & Features: It relies on the IANA tz database for Asia/Jerusalem and Asia/Kolkata to apply the correct standard or DST offset. Required features include: input date, input time, source_tz, dest_tz, and a produced converted_time. Optional/advanced features include batch conversions, output in UTC, and exposure of source and destination offsets. It also flags ambiguous or nonexistent times during DST transitions and suggests valid alternatives. Inputs & Outputs: Inputs: date (YYYY-MM-DD, required), time (HH:MM, 24h, required), source_tz (string, e.g., Asia/Jerusalem, required), dest_tz (string, e.g., Asia/Kolkata, required). Outputs: converted_time (ISO 8601 with time zone), offsets (source and destination) and UTC. Validation ensures valid date/time for the chosen zones; invalid tz names produce errors. Algorithms & Calculations: Convert by local_time to UTC using the source offset (considering DST), then UTC to dest_time using the destination offset. Offsets are sourced from the tz database. If a local time is ambiguous during DST, the tool flags it and can return the nearest valid alternative. If tz data is unavailable, it falls back to UTC. Error & Edge Cases: Missing inputs, invalid time zone identifiers, dates outside tz data, or times during DST gaps are treated as errors or require clarification. DST rules may evolve; the tool keeps an up-to-date tz database. If a DST transition exists, the converter applies the correct offset. Industry/Region & Localization: Uses ISO-8601 and IANA time zones. Output follows local Israel and India times; supports 24-hour format and international scheduling conventions. Time zone names map to Asia/Jerusalem and Asia/Kolkata for accuracy in cross-border planning. Assumptions & Exclusions: Uses current DST rules and offsets; assumes Gregorian calendar; does not manage calendar events or UI; batch mode and advanced scheduling are outside the core flow.