fix

pkg/util/time.go

@@ -0,0 +1,18 @@
+package util
+
+func CountDaysOfMonth(year int, month int) (days int) {
+	if month != 2 {
+		if month == 4 || month == 6 || month == 9 || month == 11 {
+			days = 30
+		} else {
+			days = 31
+		}
+	} else {
+		if ((year%4) == 0 && (year%100) != 0) || (year%400) == 0 {
+			days = 29
+		} else {
+			days = 28
+		}
+	}
+	return
+}