diff --git a/_demo/ctime/time.go b/_demo/ctime/time.go
new file mode 100644
index 00000000..e5a9ec56
--- /dev/null
+++ b/_demo/ctime/time.go
@@ -0,0 +1,12 @@
+package main
+
+import "github.com/goplus/llgo/c/time"
+
+func main() {
+	var tv time.Timespec
+	time.ClockGettime(time.CLOCK_REALTIME, &tv)
+	println("REALTIME sec:", tv.Sec, "nsec:", tv.Nsec)
+
+	time.ClockGettime(time.CLOCK_MONOTONIC, &tv)
+	println("MONOTONIC sec:", tv.Sec, "nsec:", tv.Nsec)
+}
diff --git a/internal/lib/time/zoneinfo_read.go b/internal/lib/time/zoneinfo_read.go
index c32d1a7c..82a2a8b1 100644
--- a/internal/lib/time/zoneinfo_read.go
+++ b/internal/lib/time/zoneinfo_read.go
@@ -320,7 +320,7 @@ func LoadLocationFromTZData(name string, data []byte) (*Location, error) {
 
 	// Fill in the cache with information about right now,
 	// since that will be the most common lookup.
-	sec := now()
+	sec := nowSec()
 	for i := range tx {
 		if tx[i].when <= sec && (i+1 == len(tx) || sec < tx[i+1].when) {
 			l.cacheStart = tx[i].when
@@ -605,7 +605,7 @@ func gorootZoneSource(goroot string) (string, bool) {
 	return goroot + "/lib/time/zoneinfo.zip", true
 }
 
-func now() (sec int64) {
+func nowSec() (sec int64) {
 	var tv time.Timespec
 	time.ClockGettime(0, &tv)
 	return int64(tv.Sec)