diff --git a/src/main/java/com/verisignlabs/dnssec/cl/VerifyZone.java b/src/main/java/com/verisignlabs/dnssec/cl/VerifyZone.java
index 40ece56..45d5944 100644
--- a/src/main/java/com/verisignlabs/dnssec/cl/VerifyZone.java
+++ b/src/main/java/com/verisignlabs/dnssec/cl/VerifyZone.java
@@ -17,11 +17,13 @@
 
 package com.verisignlabs.dnssec.cl;
 
+import java.time.Instant;
 import java.util.List;
 
 import org.apache.commons.cli.CommandLine;
 import org.apache.commons.cli.Options;
 import org.apache.commons.cli.Option;
+import org.apache.commons.cli.ParseException;
 import org.xbill.DNS.Record;
 
 import com.verisignlabs.dnssec.security.ZoneUtils;
@@ -47,6 +49,7 @@ public class VerifyZone extends CLBase {
     public int expirefudge = 0;
     public boolean ignoreTime = false;
     public boolean ignoreDups = false;
+    public Instant currentTime = null;
 
     public CLIState() {
       super("jdnssec-verifyzone [..options..] zonefile");
@@ -54,10 +57,13 @@ public class VerifyZone extends CLBase {
 
     @Override
     protected void setupOptions(Options opts) {
-      opts.addOption(Option.builder("S").optionalArg(true).argName("seconds").longOpt("sig-start-fudge")
+      opts.addOption(Option.builder("S").hasArg().argName("seconds").longOpt("sig-start-fudge")
           .desc("'fudge' RRSIG inception ties by 'seconds'").build());
-      opts.addOption(Option.builder("E").optionalArg(true).argName("seconds").longOpt("sig-expire-fudge")
+      opts.addOption(Option.builder("E").hasArg().argName("seconds").longOpt("sig-expire-fudge")
           .desc("'fudge' RRSIG expiration times by 'seconds'").build());
+      opts.addOption(Option.builder("t").hasArg().argName("time").longOpt("use-time")
+          .desc("Use 'time' as the time for verification purposes.").build());
+
       opts.addOption(
           Option.builder().longOpt("ignore-time").desc("Ignore RRSIG inception and expiration time errors.").build());
       opts.addOption(Option.builder().longOpt("ignore-duplicate-rrs").desc("Ignore duplicate record errors.").build());
@@ -82,6 +88,15 @@ public class VerifyZone extends CLBase {
         expirefudge = parseInt(optstr, 0);
       }
 
+      if ((optstr = cli.getOptionValue('t')) != null) {
+        try {
+          currentTime = convertDuration(null, optstr);
+        } catch (ParseException e) {
+          System.err.println("error: could not parse timespec");
+          usage();
+        }
+      }
+
       String[] optstrs = null;
       if ((optstrs = cli.getOptionValues('A')) != null) {
         for (int i = 0; i < optstrs.length; i++) {
@@ -110,6 +125,7 @@ public class VerifyZone extends CLBase {
     zoneverifier.getVerifier().setStartFudge(state.startfudge);
     zoneverifier.getVerifier().setExpireFudge(state.expirefudge);
     zoneverifier.getVerifier().setIgnoreTime(state.ignoreTime);
+    zoneverifier.getVerifier().setCurrentTime(state.currentTime);
     zoneverifier.setIgnoreDuplicateRRs(state.ignoreDups);
 
     List<Record> records = ZoneUtils.readZoneFile(state.zonefile, null);
diff --git a/src/main/java/com/verisignlabs/dnssec/security/DnsSecVerifier.java b/src/main/java/com/verisignlabs/dnssec/security/DnsSecVerifier.java
index 578a7d9..34af018 100644
--- a/src/main/java/com/verisignlabs/dnssec/security/DnsSecVerifier.java
+++ b/src/main/java/com/verisignlabs/dnssec/security/DnsSecVerifier.java
@@ -92,6 +92,7 @@ public class DnsSecVerifier {
   private int mExpireFudge = 0;
   private boolean mVerifyAllSigs = false;
   private boolean mIgnoreTime = false;
+  private Instant mCurrentTime = null;
 
   private Logger log;
 
@@ -133,6 +134,10 @@ public class DnsSecVerifier {
     mIgnoreTime = v;
   }
 
+  public void setCurrentTime(Instant time) {
+    mCurrentTime = time;
+  }
+
   private DnsKeyPair findKey(Name name, int algorithm, int footprint) {
     return mKeyStore.find(name, algorithm, footprint);
   }
@@ -155,7 +160,13 @@ public class DnsSecVerifier {
     if (mIgnoreTime)
       return true;
 
-    Instant now = Instant.now();
+    Instant now;
+    if (mCurrentTime != null) {
+      now = mCurrentTime;
+    } else {
+      now = Instant.now();
+    }
+
     Instant start = sigrec.getTimeSigned();
     Instant expire = sigrec.getExpire();