修复节日计算错误。

src/test/java/test/FestivalTest.java

@@ -0,0 +1,33 @@
+package test;
+
+import com.nlf.calendar.Solar;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * 节日测试
+ *
+ * @author 6tail
+ */
+public class FestivalTest {
+  @Test
+  public void test() {
+    Solar solar = Solar.fromYmd(2020, 11, 26);
+    Assert.assertEquals("[感恩节]", solar.getFestivals() + "");
+
+    solar = Solar.fromYmd(2020, 6, 21);
+    Assert.assertEquals("[父亲节]", solar.getFestivals() + "");
+
+    solar = Solar.fromYmd(2021, 5, 9);
+    Assert.assertEquals("[母亲节]", solar.getFestivals() + "");
+
+    solar = Solar.fromYmd(1986, 11, 27);
+    Assert.assertEquals("[感恩节]", solar.getFestivals() + "");
+
+    solar = Solar.fromYmd(1985, 6, 16);
+    Assert.assertEquals("[父亲节]", solar.getFestivals() + "");
+
+    solar = Solar.fromYmd(1984, 5, 13);
+    Assert.assertEquals("[母亲节]", solar.getFestivals() + "");
+  }
+}