Zenit v Celtic: On Wednesday the team will have an open training session and press conference

On 21 February, journalists and media representatives will be able to see the team prepare for the return leg of the last 32 match in the UEFA Europa League.
«Зенит» — «Селтик»: правила посещения открытой тренировки на стадионе «Санкт-Петербург»
The first 15 minutes of Zenit training will be open to the media and will be held at Stadium St. Petersburg, beginning at 11:00 St. Petersburg time. At 12:30 at the arena's press centre, Roberto Mancini and one of the players will answer the press' questions. 

Celtic will hold their press conference at the Grand Hotel Europe at 20:30. 

The return match in the UEFA Europa League will be held on 22 February kicking-off at 21:00 St. Petersburg time.