Fix timezone for Android and iOS

include/tz_ios.go

@@ -0,0 +1,30 @@
+package include
+
+/*
+#cgo CFLAGS: -x objective-c
+#cgo LDFLAGS: -framework Foundation
+#import <Foundation/Foundation.h>
+const char* getSystemTimeZone() {
+    NSTimeZone *timeZone = [NSTimeZone systemTimeZone];
+    NSString *timeZoneName = [timeZone description];
+    return [timeZoneName UTF8String];
+}
+*/
+import "C"
+
+import (
+	"strings"
+	"time"
+)
+
+func init() {
+	tzDescription := C.GoString(C.getSystemTimeZone())
+	if len(tzDescription) == 0 {
+		return
+	}
+	location, err := time.LoadLocation(strings.Split(tzDescription, " ")[0])
+	if err != nil {
+		return
+	}
+	time.Local = location
+}