diff --git a/InputMetrics/InputMetrics/Services/EventMonitor.swift b/InputMetrics/InputMetrics/Services/EventMonitor.swift
index 24bc832..07d856a 100644
--- a/InputMetrics/InputMetrics/Services/EventMonitor.swift
+++ b/InputMetrics/InputMetrics/Services/EventMonitor.swift
@@ -35,7 +35,7 @@ class EventMonitor {
     private static let timeFormatter: DateFormatter = {
         let f = DateFormatter()
         f.locale = Locale(identifier: "en_US_POSIX")
-        f.dateFormat = "HH:mm"
+        f.dateFormat = "yyyy-MM-dd'T'HH:mm"
         return f
     }()
 
diff --git a/InputMetrics/InputMetrics/ViewModels/MenuBarViewModel.swift b/InputMetrics/InputMetrics/ViewModels/MenuBarViewModel.swift
index a57981e..98f2e08 100644
--- a/InputMetrics/InputMetrics/ViewModels/MenuBarViewModel.swift
+++ b/InputMetrics/InputMetrics/ViewModels/MenuBarViewModel.swift
@@ -42,6 +42,47 @@ final class MenuBarViewModel {
         leftClicks + rightClicks + middleClicks
     }
 
+    var formattedActiveTimeRange: String? {
+        guard let first = firstActiveAt, let last = lastActiveAt else { return nil }
+
+        let isoFormatter = DateFormatter()
+        isoFormatter.locale = Locale(identifier: "en_US_POSIX")
+        isoFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm"
+
+        let legacyFormatter = DateFormatter()
+        legacyFormatter.locale = Locale(identifier: "en_US_POSIX")
+        legacyFormatter.dateFormat = "HH:mm"
+
+        let timeFormatter = DateFormatter()
+        timeFormatter.locale = Locale(identifier: "en_US_POSIX")
+        timeFormatter.dateFormat = "HH:mm"
+
+        let dateTimeFormatter = DateFormatter()
+        dateTimeFormatter.locale = Locale(identifier: "en_US_POSIX")
+        dateTimeFormatter.dateFormat = "MMM d, HH:mm"
+
+        func parse(_ value: String) -> Date? {
+            isoFormatter.date(from: value) ?? legacyFormatter.date(from: value)
+        }
+
+        guard let firstDate = parse(first), let lastDate = parse(last) else {
+            return "\(first) - \(last)"
+        }
+
+        let firstIsISO = isoFormatter.date(from: first) != nil
+        let lastIsISO = isoFormatter.date(from: last) != nil
+
+        // Only show dates if both values carry date info and they span different days
+        if firstIsISO && lastIsISO {
+            let calendar = Calendar.current
+            if calendar.startOfDay(for: firstDate) != calendar.startOfDay(for: lastDate) {
+                return "\(dateTimeFormatter.string(from: firstDate)) - \(dateTimeFormatter.string(from: lastDate))"
+            }
+        }
+
+        return "\(timeFormatter.string(from: firstDate)) - \(timeFormatter.string(from: lastDate))"
+    }
+
     var topKeys: [KeyboardEntry] {
         Array(keyboardEntries.sorted { $0.count > $1.count }.prefix(5))
     }
diff --git a/InputMetrics/InputMetrics/Views/MenuBarView.swift b/InputMetrics/InputMetrics/Views/MenuBarView.swift
index ea2feab..1bc37a5 100644
--- a/InputMetrics/InputMetrics/Views/MenuBarView.swift
+++ b/InputMetrics/InputMetrics/Views/MenuBarView.swift
@@ -97,9 +97,8 @@ struct MenuBarView: View {
                             .font(.title3)
                             .foregroundStyle(.teal)
 
-                        if let first = viewModel.firstActiveAt,
-                           let last = viewModel.lastActiveAt {
-                            Text("\(first) - \(last)")
+                        if let range = viewModel.formattedActiveTimeRange {
+                            Text(range)
                                 .font(.headline.monospacedDigit())
                         } else {
                             Text("Activity tracking will begin as you use your Mac")