From 92c7fcf137848ad74f88f75fc21bcb159eb08104 Mon Sep 17 00:00:00 2001
From: Sean Liao <sean@liao.dev>
Date: Sat, 7 Feb 2026 14:45:46 +0000
Subject: [PATCH] time: document that Parse does not support leap seconds

Fixes #50888

Change-Id: I2691442d7fccd716cd19939cf3931317e21ee4ed
Reviewed-on: https://go-review.googlesource.com/c/go/+/743060
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
---
 src/time/format.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/time/format.go b/src/time/format.go
index ad5486f4d2..cf5d6c712d 100644
--- a/src/time/format.go
+++ b/src/time/format.go
@@ -1002,6 +1002,9 @@ func skip(value, prefix string) (string, error) {
 // For layouts specifying the two-digit year 06, a value NN >= 69 will be treated
 // as 19NN and a value NN < 69 will be treated as 20NN.
 //
+// Timestamps representing leap seconds (second 60) cannot be parsed.
+// These are not representable by [Time].
+//
 // The remainder of this comment describes the handling of time zones.
 //
 // In the absence of a time zone indicator, Parse returns a time in UTC.
-- 
2.52.0