The Jerusalem Talmud (Sanhedrin 3:5) records that R. Mana instructed the bakers of Sepphoris to bake bread (either on the Sabbath or Passover) when a certain Proqla arrived. This individual should be identified with Proculus (prefect of Constantinople), who was governor of Palestine in c. 380. This would indicate that the Jerusalem Talmud was completed after this time.
References
↑Newman, Hillel (2011). "Early Halakhic Literature". In Bonfil, Robert; Talgam, Rina; Stroumsa, Guy G.; Irshai, Oded (eds.). Jews in Byzantium: Dialectics of Minority and Majority Culture. Brill. pp.629–630.