diff --git a/Tzkt.Api/Parameters/Binders/TimestampBinder.cs b/Tzkt.Api/Parameters/Binders/TimestampBinder.cs
index 378aeab8..00cda7e7 100644
--- a/Tzkt.Api/Parameters/Binders/TimestampBinder.cs
+++ b/Tzkt.Api/Parameters/Binders/TimestampBinder.cs
@@ -53,17 +53,36 @@ public Task BindModelAsync(ModelBindingContext bindingContext)
                 return Task.CompletedTask;
             }
 
-            bindingContext.Result = ModelBindingResult.Success(new TimestampParameter
+            var param = new TimestampParameter
             {
                 Eq = (value ?? eq) == null ? null : Time.FindLevel((DateTime)(value ?? eq), SearchMode.Exact),
                 Ne = ne == null ? null : Time.FindLevel((DateTime)ne, SearchMode.Exact),
-                Gt = gt == null ? null : Time.FindLevel((DateTime)gt, SearchMode.ExactOrLower),
-                Ge = ge == null ? null : Time.FindLevel((DateTime)ge, SearchMode.ExactOrHigher),
-                Lt = lt == null ? null : Time.FindLevel((DateTime)lt, SearchMode.ExactOrHigher),
-                Le = le == null ? null : Time.FindLevel((DateTime)le, SearchMode.ExactOrLower),
                 In = @in?.Select(x => Time.FindLevel(x, SearchMode.Exact)).ToList(),
                 Ni = ni?.Select(x => Time.FindLevel(x, SearchMode.Exact)).ToList(),
-            });
+            };
+
+            if (gt != null)
+            {
+                var level = Time.FindLevel((DateTime)gt, SearchMode.ExactOrLower);
+                param.Gt = level != -1 ? level : null;
+            }
+            if (ge != null)
+            {
+                var level = Time.FindLevel((DateTime)ge, SearchMode.ExactOrHigher);
+                param.Ge = level != -1 ? level : int.MaxValue;
+            }
+            if (lt != null)
+            {
+                var level = Time.FindLevel((DateTime)lt, SearchMode.ExactOrHigher);
+                param.Lt = level != -1 ? level : null;
+            }
+            if (le != null)
+            {
+                var level = Time.FindLevel((DateTime)le, SearchMode.ExactOrLower);
+                param.Le = level != -1 ? level : int.MinValue;
+            }
+
+            bindingContext.Result = ModelBindingResult.Success(param);
 
             return Task.CompletedTask;
         }
diff --git a/Tzkt.Api/Parameters/TimestampParameter.cs b/Tzkt.Api/Parameters/TimestampParameter.cs
index c6299123..4e97b9dd 100644
--- a/Tzkt.Api/Parameters/TimestampParameter.cs
+++ b/Tzkt.Api/Parameters/TimestampParameter.cs
@@ -84,29 +84,6 @@ public class TimestampParameter : INormalizable
         [JsonSchemaType(typeof(List<DateTime>))]
         public List<int> Ni { get; set; }
 
-        #region static
-        public static Int32Parameter FromDateTimeParameter(DateTimeParameter timestamp, TimeCache time)
-        {
-            if (timestamp == null) return null;
-
-            var res = new Int32Parameter();
-
-            if (timestamp.Eq != null)
-                res.Eq = time.FindLevel((DateTime)timestamp.Eq, SearchMode.Exact);
-
-            if (timestamp.Ne != null)
-                res.Ne = time.FindLevel((DateTime)timestamp.Ne, SearchMode.Exact);
-
-            if (timestamp.Gt != null)
-                res.Gt = time.FindLevel((DateTime)timestamp.Gt, SearchMode.ExactOrLower);
-
-            if (timestamp.Ge != null)
-                res.Ge = time.FindLevel((DateTime)timestamp.Ge, SearchMode.ExactOrLower);
-
-            return res;
-        }
-        #endregion
-
         public string Normalize(string name)
         {
             var sb = new StringBuilder();
diff --git a/Tzkt.Api/Repositories/AccountRepository.cs b/Tzkt.Api/Repositories/AccountRepository.cs
index 5cb9c967..173631e1 100644
--- a/Tzkt.Api/Repositories/AccountRepository.cs
+++ b/Tzkt.Api/Repositories/AccountRepository.cs
@@ -2165,13 +2165,30 @@ public async Task<IEnumerable<Operation>> GetOperations(
                 {
                     Eq = timestamp.Eq == null ? null : Time.FindLevel((DateTime)timestamp.Eq, SearchMode.Exact),
                     Ne = timestamp.Ne == null ? null : Time.FindLevel((DateTime)timestamp.Ne, SearchMode.Exact),
-                    Gt = timestamp.Gt == null ? null : Time.FindLevel((DateTime)timestamp.Gt, SearchMode.ExactOrLower),
-                    Ge = timestamp.Ge == null ? null : Time.FindLevel((DateTime)timestamp.Ge, SearchMode.ExactOrHigher),
-                    Lt = timestamp.Lt == null ? null : Time.FindLevel((DateTime)timestamp.Lt, SearchMode.ExactOrHigher),
-                    Le = timestamp.Le == null ? null : Time.FindLevel((DateTime)timestamp.Le, SearchMode.ExactOrLower),
                     In = timestamp.In?.Select(x => Time.FindLevel(x, SearchMode.Exact)).ToList(),
-                    Ni = timestamp.Ni?.Select(x => Time.FindLevel(x, SearchMode.Exact)).ToList(),
+                    Ni = timestamp.Ni?.Select(x => Time.FindLevel(x, SearchMode.Exact)).ToList()
                 };
+
+                if (timestamp.Gt != null)
+                {
+                    var lvl = Time.FindLevel((DateTime)timestamp.Gt, SearchMode.ExactOrLower);
+                    _timestamp.Gt = lvl != -1 ? lvl : null;
+                }
+                if (timestamp.Ge != null)
+                {
+                    var lvl = Time.FindLevel((DateTime)timestamp.Ge, SearchMode.ExactOrHigher);
+                    _timestamp.Ge = lvl != -1 ? lvl : int.MaxValue;
+                }
+                if (timestamp.Lt != null)
+                {
+                    var lvl = Time.FindLevel((DateTime)timestamp.Lt, SearchMode.ExactOrHigher);
+                    _timestamp.Lt = lvl != -1 ? lvl : null;
+                }
+                if (timestamp.Le != null)
+                {
+                    var lvl = Time.FindLevel((DateTime)timestamp.Le, SearchMode.ExactOrLower);
+                    _timestamp.Le = lvl != -1 ? lvl : int.MinValue;
+                }
             }
 
             switch (account)