What is the name of the league that celebrated its 87th season, in which Club Deportivo Leganés participated in?
2017–18 CD Leganés season During the 2017–18 season, Club Deportivo Leganés are participating in La Liga for the second time in their history, and the Copa del Rey.
1988–89 La Liga The 1988–89 La Liga season, the 58th since its establishment, started on September 3, 1988, and finished on June 25, 1989.