diff --git a/sparql/src/main/java/fr/inria/corese/sparql/triple/function/core/ZeroaryFunction.java b/sparql/src/main/java/fr/inria/corese/sparql/triple/function/core/ZeroaryFunction.java
index 6e882b25f..4de1aa3db 100644
--- a/sparql/src/main/java/fr/inria/corese/sparql/triple/function/core/ZeroaryFunction.java
+++ b/sparql/src/main/java/fr/inria/corese/sparql/triple/function/core/ZeroaryFunction.java
@@ -1,15 +1,17 @@
 package fr.inria.corese.sparql.triple.function.core;
 
+import java.util.Optional;
+
+import fr.inria.corese.kgram.api.core.ExprType;
+import fr.inria.corese.kgram.api.query.Environment;
+import fr.inria.corese.kgram.api.query.Producer;
 import fr.inria.corese.sparql.api.Computer;
 import fr.inria.corese.sparql.api.IDatatype;
 import fr.inria.corese.sparql.datatype.CoreseDouble;
 import fr.inria.corese.sparql.datatype.DatatypeMap;
+import fr.inria.corese.sparql.exceptions.EngineException;
 import fr.inria.corese.sparql.triple.function.term.Binding;
 import fr.inria.corese.sparql.triple.function.term.TermEval;
-import fr.inria.corese.kgram.api.core.ExprType;
-import fr.inria.corese.kgram.api.query.Environment;
-import fr.inria.corese.sparql.exceptions.EngineException;
-import fr.inria.corese.kgram.api.query.Producer;
 
 /**
  *
@@ -17,19 +19,44 @@
  *
  */
 public class ZeroaryFunction extends TermEval {
-     
-    public ZeroaryFunction(){}
-    
-    public ZeroaryFunction(String name){
+
+    public ZeroaryFunction() {
+    }
+
+    public ZeroaryFunction(String name) {
         super(name);
     }
-    
+
     @Override
     public IDatatype eval(Computer eval, Binding b, Environment env, Producer p) throws EngineException {
-        switch (oper()){
-            case ExprType.RANDOM:   return CoreseDouble.create(Math.random());
-            case ExprType.NOW:      return DatatypeMap.newDate();
-        } 
+        switch (oper()) {
+            case ExprType.RANDOM:
+                return CoreseDouble.create(Math.random());
+            case ExprType.NOW:
+                return this.getOrSetCurrentTime(b);
+
+        }
         return null;
     }
+
+    /**
+     * Returns the current time, or sets it if it is not already set.
+     * 
+     * @param binding The Binding to get or set the current time in
+     * @return The current time
+     */
+    private IDatatype getOrSetCurrentTime(Binding binding) {
+
+        // Check if current time is already set in the Binding
+        Optional<IDatatype> savedNowTime = binding.getNowValue();
+
+        if (savedNowTime.isPresent()) {
+            return savedNowTime.get();
+        } else {
+            // If not set, create a new time, save it, and return it
+            IDatatype nowValue = DatatypeMap.newDate();
+            binding.setNowValue(nowValue);
+            return nowValue;
+        }
+    }
 }
diff --git a/sparql/src/main/java/fr/inria/corese/sparql/triple/function/term/Binding.java b/sparql/src/main/java/fr/inria/corese/sparql/triple/function/term/Binding.java
index 5f17c483c..b2f352699 100644
--- a/sparql/src/main/java/fr/inria/corese/sparql/triple/function/term/Binding.java
+++ b/sparql/src/main/java/fr/inria/corese/sparql/triple/function/term/Binding.java
@@ -20,6 +20,8 @@
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Optional;
+
 import org.slf4j.LoggerFactory;
 import org.slf4j.Logger;
 
@@ -112,6 +114,9 @@ public class Share {
         // transformer also records its Binding and hence its Visitor
         private Object transformerVisitor;
 
+        // Enables function now() to return the same value during processing
+        private Optional<IDatatype> savNowValue = Optional.empty();
+
         public Object getTransformerVisitor() {
             return transformerVisitor;
         }
@@ -120,6 +125,14 @@ public void setTransformerVisitor(Object transformerVisitor) {
             this.transformerVisitor = transformerVisitor;
         }
 
+        public Optional<IDatatype> getSavNowValue() {
+            return savNowValue;
+        }
+
+        public void setNowValue(IDatatype nowValue) {
+            this.savNowValue = Optional.ofNullable(nowValue);
+        }
+
     }
 
     public static Binding create() {
@@ -662,6 +675,14 @@ void shareGlobalVariable(Binding b) {
         setGlobalVariableNames(b.getGlobalVariableNames());
         setGlobalVariableValues(b.getGlobalVariableValues());
     }
+
+    public Optional<IDatatype> getNowValue() {
+        return getShare().getSavNowValue();
+    }
+
+    public void setNowValue(IDatatype nowValue) {
+        getShare().setNowValue(nowValue);
+    }
     
     public HashMap<String, Variable> getGlobalVariableNames() {
         return globalVariable;