Electronic Journal of Differential Equations, Vol. 2024 (2024), No. 30, pp. 1-22. Title: Properties of the solutions to periodic conformable non-autonomous non-instantaneous impulsive differential equations Authors: Yuanlin Ding (Guizhou Univ., Guiyang, Guizhou, China) Kui Liu (Guizhou Univ., Guiyang, Guizhou, China)- Abstract: In this article, we study the properties of solutions to periodic non-autonomous conformable non-instantaneous impulsive differential equations. We use a conformable Cauchy matrix and obtain some basic properties of the periodic solution to the homogeneous and non-homogeneous problems. We consider the periodicity of solutions to nonlinear problem via a fixed theorem. Submitted February 9, 2024. Published April 15, 2024. Math Subject Classifications: 34A37, 34C25. Key Words: Impulsive differential equation; conformable derivative; non-instantaneous; periodic solution.