diff --git a/.changeset/fair-hoops-ask.md b/.changeset/fair-hoops-ask.md
new file mode 100644
index 0000000..f95afb0
--- /dev/null
+++ b/.changeset/fair-hoops-ask.md
@@ -0,0 +1,5 @@
+---
+'@formwerk/core': patch
+---
+
+fix: negative signs affecting number parsing with date segments
diff --git a/packages/core/src/useDateTimeField/useDateTimeSegment.ts b/packages/core/src/useDateTimeField/useDateTimeSegment.ts
index 1d60c00..81f11e8 100644
--- a/packages/core/src/useDateTimeField/useDateTimeSegment.ts
+++ b/packages/core/src/useDateTimeField/useDateTimeSegment.ts
@@ -113,7 +113,6 @@ export function useDateTimeSegment(_props: Reactivify<DateTimeSegmentProps>) {
 
       const { min, max, maxLength } = getMetadata();
       const nextValue = currentInput + evt.data;
-      currentInput = nextValue;
 
       const parsed = parser.parse(nextValue);
       if (isNullOrUndefined(min) || isNullOrUndefined(max) || isNullOrUndefined(maxLength)) {
@@ -124,6 +123,7 @@ export function useDateTimeSegment(_props: Reactivify<DateTimeSegmentProps>) {
         return;
       }
 
+      currentInput = nextValue;
       if (segmentEl.value) {
         segmentEl.value.textContent = currentInput;
       }