these are the more complicated code improvements

src/main/java/com/kosherjava/zmanim/util/Zman.java

@@ -228,13 +228,9 @@ public void setDescription(String description) {
 	 * than the second.
 	 * Please note that this class will handle cases where either the {@code Zman} is a null or {@link #getZman()} returns a null.
 	 */
-	public static final Comparator<Zman> DATE_ORDER = new Comparator<Zman>() {
-		public int compare(Zman zman1, Zman zman2) {
-        long firstTime = (zman1 == null || zman1.getZman() == null) ? Long.MAX_VALUE : zman1.getZman().toEpochMilli();
-        long secondTime = (zman2 == null || zman2.getZman() == null) ? Long.MAX_VALUE : zman2.getZman().toEpochMilli();
-        return Long.compare(firstTime, secondTime);
-		}
-    };
+	public static final Comparator<Zman> DATE_ORDER = Comparator.comparingLong(zman ->
+			zman == null || zman.getZman() == null ? Long.MAX_VALUE : zman.getZman().toEpochMilli()
+	);
 
 	/**
 	 * A {@link Comparator} that will compare and sort zmanim by zmanim label order. Compares its two arguments by the zmanim label
@@ -243,13 +239,9 @@ public int compare(Zman zman1, Zman zman2) {
 	 * Please note that this class will sort cases where either the {@code Zman} is a null or {@link #label} returns a null
 	 * as empty {@code String}s.
 	 */
-	public static final Comparator<Zman> NAME_ORDER = new Comparator<Zman>() {
-		public int compare(Zman zman1, Zman zman2) {
-        String firstLabel = (zman1 == null || zman1.getLabel() == null) ? "" : zman1.getLabel();
-        String secondLabel = (zman2 == null || zman2.getLabel() == null) ? "" : zman2.getLabel();
-        return firstLabel.compareTo(secondLabel);
-		}
-    };
+	public static final Comparator<Zman> NAME_ORDER = Comparator.comparing(zman ->
+			zman == null || zman.getLabel() == null ? "" : zman.getLabel()
+	);
 
 	/**
 	 * A {@link Comparator} that will compare and sort duration based <em>zmanim</em>  such as
@@ -259,13 +251,9 @@ public int compare(Zman zman1, Zman zman2) {
 	 * integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.
 	 * Please note that this class will sort cases where {@code Zman} is a null.
 	 */
-	public static final Comparator<Zman> DURATION_ORDER = new Comparator<Zman>() {
-		public int compare(Zman zman1, Zman zman2) {
-			long firstDuration  = zman1 == null ? Long.MAX_VALUE : zman1.getDuration();
-			long secondDuration  = zman2 == null ? Long.MAX_VALUE : zman2.getDuration();
-			return Long.compare(firstDuration, secondDuration);
-		}
-    };
+	public static final Comparator<Zman> DURATION_ORDER = Comparator.comparingLong(
+			zman -> zman == null ? Long.MAX_VALUE : zman.getDuration()
+	);
 
 	/**
 	 * A method that returns an XML formatted <code>String</code> representing the serialized <code>Object</code>. Very

src/main/java/com/kosherjava/zmanim/util/ZmanimFormatter.java

@@ -320,13 +320,13 @@ public String formatXSDDurationTime(Time time) {
 			duration.append("T");
 
 			if (time.getHours() != 0)
-				duration.append(time.getHours() + "H");
+				duration.append(time.getHours()).append("H");
 
 			if (time.getMinutes() != 0)
-				duration.append(time.getMinutes() + "M");
+				duration.append(time.getMinutes()).append("M");
 
 			if (time.getSeconds() != 0 || time.getMilliseconds() != 0) {
-				duration.append(time.getSeconds() + "." + milliNF.format(time.getMilliseconds()));
+				duration.append(time.getSeconds()).append(".").append(milliNF.format(time.getMilliseconds()));
 				duration.append("S");
 			}
 			if (duration.length() == 1) // zero seconds