From 6e8f399e153f2c9ed2f3da779f6e6b757dade22e Mon Sep 17 00:00:00 2001
From: milo <1569491816@qq.com>
Date: Fri, 16 Jan 2026 22:29:25 +0800
Subject: [PATCH] [fix] fix normalization issue of mktime and timegm

---
 components/libc/compilers/common/ctime.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/components/libc/compilers/common/ctime.c b/components/libc/compilers/common/ctime.c
index 159667bbcfa..bcd19fc8aad 100644
--- a/components/libc/compilers/common/ctime.c
+++ b/components/libc/compilers/common/ctime.c
@@ -391,7 +391,6 @@ time_t timegm(struct tm * const t)
         return (time_t)-1;
     }
 
-    years = (time_t)t->tm_year - 70;
     if (t->tm_sec > 60)         /* seconds after the minute - [0, 60] including leap second */
     {
         t->tm_min += t->tm_sec / 60;
@@ -433,6 +432,8 @@ time_t timegm(struct tm * const t)
         return (time_t) -1;
     }
 
+    years = (time_t)t->tm_year - 70;
+
     /* Days since 1970 is 365 * number of years + number of leap years since 1970 */
     day = years * 365 + (years + 1) / 4;