ABSTRACT Some farmers at Middle Egypt delay sowing data of spring wheat because their farms are planted with some cash crops that will be harvested late in December or January such as onions, potatoes and cabbage beside climate change. Thus, the experiment was suggested and carried out at Assiut agriculture research station (clay soil) at Middle Egypt during two successful seasons. Two field experiments were carried out at the Assuit Agricultural Research Station, Egypt, in two successive season of 2021/2022 and 2022/2023, using a split-plot design in a randomized complete block design arrangement with four replicates. Using three sowing dates (10^th November, 5^th December and 30^th December) were randomly distributed in main plot and sixteen genotypes (fourteen lines and two bread wheat cultivars Misr 3 and Sakha 95) in subplot. The sowing dates had significant effects for all studied traits in both seasons and combined data. The genotype  L8 gave the highest number of spikes/ m² (369 and 361) in the first and second sowing date respectively, while L7 recorded (266) in the late sowing, while, L12 showed the highest number of kernels / spike (86.62 and 82.75) in the first and second season, and L13 (65.13) under the late planting. The highest value for 1000 (KW) was recorded for L13 (42.71and 40.52 g) in the optimum and second sowing date and L8 (82.98 g) under the late sowing. Concerning grain yield ard/fad  (GY ard/fad) the lines L13, L12 and L11 showed the highest grain yield in the first, second and late sowing date, respectively.