From fc4350ac3ae2a63ca423eef7c1406cd4c299d80e Mon Sep 17 00:00:00 2001
From: Frédéric Buclin <LpSolit@gmail.com>
Date: Mon, 8 Sep 2014 12:32:24 +0200
Subject: Bug 1046213: datetime_from() generates wrong dates if year < 1901
 r=sgreen a=glob

---
 Bugzilla/Util.pm | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

(limited to 'Bugzilla')

diff --git a/Bugzilla/Util.pm b/Bugzilla/Util.pm
index fa74ee604..be65b46c6 100644
--- a/Bugzilla/Util.pm
+++ b/Bugzilla/Util.pm
@@ -566,10 +566,14 @@ sub datetime_from {
 
     return undef if !@time;
 
-    # strptime() counts years from 1900, and months from 0 (January).
-    # We have to fix both values.
+    # strptime() counts years from 1900, except if they are older than 1901
+    # in which case it returns the full year (so 1890 -> 1890, but 1984 -> 84,
+    # and 3790 -> 1890). We make a guess and assume that 1100 <= year < 3000.
+    $time[5] += 1900 if $time[5] < 1100;
+
     my %args = (
-        year   => $time[5] + 1900,
+        year   => $time[5],
+        # Months start from 0 (January).
         month  => $time[4] + 1,
         day    => $time[3],
         hour   => $time[2],
-- 
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