date helper

src/main/java/emu/grasscutter/utils/DateHelper.java

+package emu.grasscutter.utils;
+
+import java.util.Date;
+import java.util.Calendar;
+
+public final class DateHelper {
+    public static Date onlyYDM(Date now) {
+        Calendar calendar = Calendar.getInstance();
+		calendar.setTime(now);
+		calendar.set(Calendar.HOUR_OF_DAY, 0);
+		calendar.set(Calendar.MINUTE, 0);
+		calendar.set(Calendar.SECOND, 0);
+		calendar.set(Calendar.MILLISECOND, 0);
+		return calendar.getTime();
+    }
+}