Both datasets were processed during the research workflow associated with Choi et al. (2024) and is intended for examining the daily evolution patterns of springtime Antarctic ozone according to the timing of the stratospheric final warming (SFW). Information on the SFW onset dates can be found in Choi et al. (2024) and can be downloaded through the KPDC (Data ID: KOPRI-KPDC-00002810). These datasets provide information on the daily evolution of stratospheric ozone anomalies according to the timing of the SFW. Each file contains composite mean values calculated from the events classified by SFW timing (early vs. late). File structure: Each file contains 153 daily time steps, covering the period from 1 September to 31 January of the following year. Reference Choi, H., Kwon, H., Kim, S. J., & Kim, B. M. (2024). Warmer Antarctic summers in recent decades linked to earlier stratospheric final warming occurrences. Communications Earth & Environment, 5(1), 50. Tetzner, D., Thomas, E., & Allen, C. (2019). A validation of ERA5 reanalysis data in the Southern Antarctic Peninsula—Ellsworth land region, and its implications for ice core studies. Geosciences, 9(7), 289.