diff --git a/.solhint.json b/.solhint.json
index ce53bc8..8055e4d 100644
--- a/.solhint.json
+++ b/.solhint.json
@@ -2,21 +2,23 @@
   "extends": "solhint:all",
   "rules": {
     "foundry-test-functions": ["off"],
+    "not-rely-on-time": ["off"],
 
-    "compiler-version": ["error","^0.8.0"],
-    "state-visibility": "error",
-    "no-empty-blocks": "error",
+    "avoid-tx-origin": "error",
     "check-send-result": "error",
-    "private-vars-leading-underscore": "error",
     "code-complexity": "error",
-    "visibility-modifier-order": "error",
+    "compiler-version": ["error","^0.8.0"],
+    "contract-name-camelcase": "error",
     "func-name-mixedcase": "error",
     "function-max-lines": "error",
-    "no-unused-vars": "error",
+    "gas-strict-inequalities": "error",
+    "max-states-count": "error",
+    "no-empty-blocks": "error",
     "no-inline-assembly": "error",
-    "contract-name-camelcase": "error",
+    "no-unused-vars": "error",
     "ordering": "error",
-    "avoid-tx-origin": "error",
-    "max-states-count": "error"
+    "private-vars-leading-underscore": "error",
+    "state-visibility": "error",
+    "visibility-modifier-order": "error"
   }
 }
diff --git a/contracts/DateTimeUtils.sol b/contracts/DateTimeUtils.sol
index ee41e76..cebae5e 100644
--- a/contracts/DateTimeUtils.sol
+++ b/contracts/DateTimeUtils.sol
@@ -44,7 +44,6 @@ using {
 } for Months global;
 using {
     _timestampLess as <,
-    _timestampLessOrEqual as <=,
     _timestampEqual as ==,
     _timestampNotEqual as !=
 } for Timestamp global;
@@ -68,10 +67,6 @@ function _monthsEqual(Months a, Months b) pure returns (bool equal) {
     return (Months.unwrap(a) == Months.unwrap(b));
 }
 
-function _timestampLessOrEqual(Timestamp left, Timestamp right) pure returns (bool result) {
-    return Timestamp.unwrap(left) <= Timestamp.unwrap(right);
-}
-
 function _timestampLess(Timestamp left, Timestamp right) pure returns (bool result) {
     return Timestamp.unwrap(left) < Timestamp.unwrap(right);
 }