Write SQL query to solve given problem: What is the birth date of the player with the most assists during the 1985 All-Star season?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.birthDate FROM players AS T1 INNER JOIN player_allstar AS T2 ON T1.playerID = T2.playerID WHERE T2.season_id = 1985 ORDER BY T2.assists DESC LIMIT 1