bug fix:timezone error

calendar/chinese_test.go

@@ -0,0 +1,11 @@
+package calendar
+
+import (
+	"fmt"
+	"testing"
+)
+
+func Test_Solar(t *testing.T) {
+	fmt.Println(Solar(2021, 1, 1, false))
+	fmt.Println(Solar(2020, 1, 1, false))
+}