diff --git a/src/main/java/net/fabricmc/loom/util/ZipReprocessorUtil.java b/src/main/java/net/fabricmc/loom/util/ZipReprocessorUtil.java
index a3b7797a6..d962be8c4 100644
--- a/src/main/java/net/fabricmc/loom/util/ZipReprocessorUtil.java
+++ b/src/main/java/net/fabricmc/loom/util/ZipReprocessorUtil.java
@@ -30,7 +30,6 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.file.Path;
-import java.nio.file.attribute.FileTime;
 import java.util.Calendar;
 import java.util.Comparator;
 import java.util.GregorianCalendar;
@@ -42,11 +41,6 @@
 import org.intellij.lang.annotations.MagicConstant;
 
 public class ZipReprocessorUtil {
-	/**
-	 * See {@link org.gradle.api.internal.file.archive.ZipCopyAction} about this.
-	 */
-	private static final long CONSTANT_TIME_FOR_ZIP_ENTRIES = new GregorianCalendar(1980, Calendar.FEBRUARY, 1, 0, 0, 0).getTimeInMillis();
-
 	private ZipReprocessorUtil() { }
 
 	private static final String MANIFEST_LOCATION = "META-INF/MANIFEST.MF";
@@ -183,9 +177,8 @@ private static void copyZipEntry(ZipOutputStream zipOutputStream, ZipEntry entry
 	}
 
 	private static void setConstantFileTime(ZipEntry entry) {
-		entry.setTime(ZipReprocessorUtil.CONSTANT_TIME_FOR_ZIP_ENTRIES);
-		entry.setLastModifiedTime(FileTime.fromMillis(ZipReprocessorUtil.CONSTANT_TIME_FOR_ZIP_ENTRIES));
-		entry.setLastAccessTime(FileTime.fromMillis(ZipReprocessorUtil.CONSTANT_TIME_FOR_ZIP_ENTRIES));
+		// See https://github.com/openjdk/jdk/blob/master/test/jdk/java/util/zip/ZipFile/ZipEntryTimeBounds.java
+		entry.setTime(new GregorianCalendar(1980, Calendar.JANUARY, 1, 0, 0, 0).getTimeInMillis());
 	}
 
 	@MagicConstant(valuesFromClass = ZipOutputStream.class)
diff --git a/src/test/groovy/net/fabricmc/loom/test/integration/ReproducibleBuildTest.groovy b/src/test/groovy/net/fabricmc/loom/test/integration/ReproducibleBuildTest.groovy
index f40a65e0d..0936f58f7 100644
--- a/src/test/groovy/net/fabricmc/loom/test/integration/ReproducibleBuildTest.groovy
+++ b/src/test/groovy/net/fabricmc/loom/test/integration/ReproducibleBuildTest.groovy
@@ -55,13 +55,13 @@ class ReproducibleBuildTest extends Specification implements GradleProjectTestTr
 
 		where:
 		version              | modHash                               | sourceHash
-		DEFAULT_GRADLE      | "174c9b52f4bc6d489548d11b42e853cf"    | [
-			"5e6e56df303b4fbaaef372d6f143dbfc",
-			"92b6fbffd0bd14bf3c626750eb86c264"
+		DEFAULT_GRADLE      | "97240b42385adfaa1952e9c4ea942f71"    | [
+			"61438feb9bd548788bbc637637d202fc",
+			"185ad8396d89b726064682bf22572036"
 		]
-		PRE_RELEASE_GRADLE  | "174c9b52f4bc6d489548d11b42e853cf"    | [
-			"5e6e56df303b4fbaaef372d6f143dbfc",
-			"92b6fbffd0bd14bf3c626750eb86c264"
+		PRE_RELEASE_GRADLE  | "97240b42385adfaa1952e9c4ea942f71"    | [
+			"61438feb9bd548788bbc637637d202fc",
+			"185ad8396d89b726064682bf22572036"
 		]
 	}
 
diff --git a/src/test/groovy/net/fabricmc/loom/test/unit/ZipUtilsTest.groovy b/src/test/groovy/net/fabricmc/loom/test/unit/ZipUtilsTest.groovy
index 95c469166..1b40e3f3d 100644
--- a/src/test/groovy/net/fabricmc/loom/test/unit/ZipUtilsTest.groovy
+++ b/src/test/groovy/net/fabricmc/loom/test/unit/ZipUtilsTest.groovy
@@ -26,6 +26,7 @@ package net.fabricmc.loom.test.unit
 
 import java.nio.charset.StandardCharsets
 import java.nio.file.Files
+import java.time.ZoneId
 
 import spock.lang.Specification
 
@@ -155,6 +156,9 @@ class ZipUtilsTest extends Specification {
 
 	def "append zip entry"() {
 		given:
+		def currentTimezone = TimeZone.getDefault()
+		TimeZone.setDefault(TimeZone.getTimeZone(ZoneId.of(timezone)))
+
 		// Create a reproducible input zip
 		def dir = Files.createTempDirectory("loom-zip-test")
 		def zip = Files.createTempFile("loom-zip-test", ".zip")
@@ -167,9 +171,21 @@ class ZipUtilsTest extends Specification {
 		// Add an entry to it
 		ZipReprocessorUtil.appendZipEntry(zip.toFile(), "fabric.mod.json", "Some text".getBytes(StandardCharsets.UTF_8))
 
+		// Reset the timezone back
+		TimeZone.setDefault(currentTimezone)
+
 		then:
 		ZipUtils.unpack(zip, "text.txt") == "hello world".bytes
 		ZipUtils.unpack(zip, "fabric.mod.json") == "Some text".bytes
-		Checksum.sha1Hex(zip) == "232ecda4c770bde8ba618e7a194a4f7b57928dc5"
+		Checksum.sha1Hex(zip) == "1b06cc0aaa65ab2b0d423fe33431ff5bd14bf9c8"
+
+		where:
+		timezone 			| _
+		"UTC" 				| _
+		"US/Central" 		| _
+		"Europe/London" 	| _
+		"Australia/Sydney" 	| _
+		"Etc/GMT-6" 		| _
+		"Etc/GMT+9" 		| _
 	}
 }