The study of genotype x environment (G x E) interaction plays a crucial role in the context of changing climate scenarios. This field experiment was conducted during rabi (winter) seasons of two consecutive years, i.e., 2017-18 and 2018-19, to identify the potential wheat varieties having greater yield stability over varying sowing dates under eastern sub-Himalayan plains of India. The experiment was laid out in a split-plot design having four different dates of sowing (November 5, November 25, December 15, and January 5) in main plots with six wheat genotypes (HS 562, HD 2967, HD 3086, HI 1544, MACS 6222, and WR 522) in sub-plots, each replicated three times. Observations such as plant height (cm), days to physiological maturity, spikes m-2, grains spike-1, 1000 seed weight (g), biomass yield (q ha-1), and grain yield (q ha-1) were recorded. The genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) values of the characters were low to moderate. The association among the characters indicated improvement in most of the attributing characters except 1000 seed weight, and the path analysis revealed that the highest direct effect on grain yield was exhibited by spike m-2 (1.216). The ranking of the genotypes based on the rescaled index value of the seven characters showed that the variety HD 2967 was the best and highest performer with rank 1, followed by MACS 6222 (Rank 2) and HI 1544 (Rank 3). However, stability analysis revealed that HI 1544 and MACS 6222 were the most stable for grain yield compared to other varieties. Based on the AMMI stability value (ASV), yield stability index (YSI), and the Eberhart and Russel model (1966), HI 1544 (Rank 1) was the most stable for grain yield over the eight environments. The AMMI analysis revealed that the most stable varieties were HI 1544 and MACS 6222, and the highest yielding variety, HD 2967 (Rank 3) had a better YSI ranking but with lower buffering capacity, leading to a higher response to environmental fluctuations arising out of the varying sowing dates under the eastern sub-Himalayan plains of India.