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…arser strptime accepts a seconds value of 60 (glibc also 61), and the parser added it to the time of day, wrapping it into the next minute. Arrow cannot represent leap seconds, and the ISO-8601 parser rejects them, so reject them here too. The check applies only when the time of day is used, so Gandiva's to_date, which ignores the time, still accepts such values. Drafted by Claude Code (an AI agent) and reviewed & approved by pearu.
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This was referenced Oct 19, 2026
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Rationale for this change
strptimeaccepts a seconds value of 60 (glibc also 61), and the parser added it to the time of day, which wrapped it into the next minute. Arrow cannot represent leap seconds, and the ISO-8601 parser rejects them.What changes are included in this PR?
The parser rejects a seconds value of 60 or more. The check applies only when the time of day is used, so Gandiva's
to_date, which ignores the time, still accepts such values.Are these changes tested?
Yes, in
TimestampParser.StrptimeParser, and a Gandivato_datetest checks that a leap second still gives the date when the time is ignored.Are there any user-facing changes?
Leap seconds no longer parse with
strptimeformats, except in Gandiva'sto_date.AI usage disclosure
Developed with AI assistance (Claude Code): the fix, the tests and this description were AI-generated under my direction and reviewed line by line by me. I own and can debug these changes. No copyrighted material is included.