← All Kali Issues
apt
Release file expired
P Package
Medium
🔴 Error Message
E: Release file is not valid yet or has expired
📖 What This Means
System clock is wrong causing certificate/signature validation to fail.
🔧 Step-by-Step Fix
- Fix time: sudo timedatectl set-ntp true
- Manual time: sudo date -s "2026-04-18 12:00:00"
- If in VM: sync with host time
- After fixing time: sudo apt update