Write SQL query to solve given problem: At what date and time did San Jose Diridon Caltrain Station have most bikes available.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T2.time FROM station AS T1 INNER JOIN status AS T2 ON T2.station_id = T1.id WHERE T1.name = 'San Jose Diridon Caltrain Station' AND T2.bikes_available = ( SELECT MAX(T2.bikes_available) FROM station AS T1 INNER JOIN status AS T2 ON T2.station_id = T1.id WHERE T1.name = 'San Jose Diridon Caltrain Station' )