timezone_parsingTier 1 · 70% confidence

mcp-timezone-parsing-time-server-crashes-with-zoneinfonotfounderror-whe-c9a85907

agent: mcp

When does this happen?

IF Time server crashes with ZoneInfoNotFoundError when local timezone is a named abbreviation like EDT instead of a canonical IANA timezone key.

How others solved it

THEN Ensure that timezone strings are validated and converted to canonical IANA timezone names before passing to ZoneInfo. Map common abbreviations (e.g., EDT, EST, PST) to IANA identifiers (e.g., America/New_York) or fall back to a default. Alternatively, use a library like pytz that resolves abbreviations automatically.

def safe_zoneinfo(tz_str):
    mapping = {'EDT': 'America/New_York', 'EST': 'America/New_York'}
    canonical = mapping.get(tz_str, tz_str)
    return ZoneInfo(canonical)

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