Optimising sowing date and variety selection is critical for enhancing wheat productivity under changing climatic conditions. A two-year field study (2022-2023) was conducted to investigate the interaction effects of sowing dates, varieties, and seasons on phenology, yield components, and grain yield of wheat. The treatments comprised six sowing dates (25th October, 5th November, 15th November, 1st December, 15th December, and 1st January) with two varieties (Borlaug and Norman) across two seasons. Results revealed significant effects of sowing date × variety and sowing date × season interactions on 50% flowering, 1000-grain weight, spikes per m², and grain yield. Borlaug sown on 15th November consistently produced the heaviest grains (54.08 g), the highest spike density (430.8 spikes/m²), and maximum grain yield (34,644 kg ha⁻¹ in 2023), followed by Borlaug on 5th November and 15th December. Norman exhibited inferior performance under late sowing (1st January), recording the lowest 1000-grain weight (30.33 g) and yield (1630 kg ha⁻¹). Grain yield declined significantly with delayed planting, primarily due to reductions in spike density, grains per spike, and 1000-grain weight. The findings emphasise that mid-November sowing, particularly with Borlaug, exploits favourable temperature and radiation regimes, ensuring optimal vegetative growth, assimilate partitioning, and yield formation. These results corroborate earlier reports highlighting mid-November sowing as the optimum planting window for wheat in similar agro-ecologies.