diff --git a/src/core/environment/getEnvironmentDetails.ts b/src/core/environment/getEnvironmentDetails.ts
index 8d4f157f4d6..6f0c9fe2bff 100644
--- a/src/core/environment/getEnvironmentDetails.ts
+++ b/src/core/environment/getEnvironmentDetails.ts
@@ -179,22 +179,12 @@ export async function getEnvironmentDetails(cline: Task, includeFileDetails: boo
 	// Add current time information with timezone.
 	const now = new Date()
 
-	const formatter = new Intl.DateTimeFormat(undefined, {
-		year: "numeric",
-		month: "numeric",
-		day: "numeric",
-		hour: "numeric",
-		minute: "numeric",
-		second: "numeric",
-		hour12: true,
-	})
-
-	const timeZone = formatter.resolvedOptions().timeZone
+	const timeZone = Intl.DateTimeFormat().resolvedOptions().timeZone
 	const timeZoneOffset = -now.getTimezoneOffset() / 60 // Convert to hours and invert sign to match conventional notation
 	const timeZoneOffsetHours = Math.floor(Math.abs(timeZoneOffset))
 	const timeZoneOffsetMinutes = Math.abs(Math.round((Math.abs(timeZoneOffset) - timeZoneOffsetHours) * 60))
 	const timeZoneOffsetStr = `${timeZoneOffset >= 0 ? "+" : "-"}${timeZoneOffsetHours}:${timeZoneOffsetMinutes.toString().padStart(2, "0")}`
-	details += `\n\n# Current Time\n${formatter.format(now)} (${timeZone}, UTC${timeZoneOffsetStr})`
+	details += `\n\n# Current Time\nCurrent time in ISO 8601 UTC format: ${now.toISOString()}\nUser time zone: ${timeZone}, UTC${timeZoneOffsetStr}`
 
 	// Add context tokens information.
 	const { contextTokens, totalCost } = getApiMetrics(cline.clineMessages)