Precise and resilient time distribution is a critical enabler for 5G, future 6G networks, financial systems, power grids, and critical infrastructure. Today, global synchronization architectures remain largely dependent on GPS/GNSS, creating significant vulnerabilities against jamming, spoofing, and geopolitical supply constraints. Our presentation presents a national strategy for achieving true GNSS independence by generating a BIPM-registered UTC(k) reference at the national timing laboratory and distributing it nationwide through Enhanced Partial Timing Support (ePTS), a new ITU-T supplement currently under standardization. ePTS builds on IEEE 1588/G.8275 concepts while introducing advanced mechanisms for asymmetry calibration, route compensation, and dynamic error budgeting in existing MPLS/IP infrastructures. This allows highly accurate time transfer without requiring full on-path support or satellite reliance. Field results from Türk Telekom’s nationwide backbone demonstrate sub-100 ns performance over 1500 km, validating that UTC(k) can be securely extended to all network domains with carrier-grade resilience. The approach ensures robustness against GNSS disruptions, lowers operational costs by reducing satellite dependencies, and provides a sovereign timing infrastructure essential for critical sectors. Thepresentation will highlight architectural principles, deployment lessons, and integration with national metrology institutes, positioning ePTS as a foundation for GNSS-independent 5G/6G rollouts and a blueprint for other nations seeking strategic timing autonomy.