Upvote:1
This is a long shot: Find online flight schedules on the airlines website, if they have them. Not by search, but like a document that lists times. Then go to archive.org and look for a copy of their website close to that date and try to find the same thing.
Or go to http://flightaware.com/live/flight/CFG5314 and there is a link to purchase the history. Unfortunately, the history for this flight is not automated but the contact link hints that they might be able to do something. If there's a legal issue, Condor might be forced to reveal it. If not, they might respond to sweet talk and/or money.
Upvote:1
Might not be the exact day but it's very likely there was a schedule and then https://www.amazon.de/Take-off-Condor-Boeing-Frankfurt-Mauritius-Cockpit-Fl%C3%BCge/dp/B00HW1QG6M surely this mentions when they took off or landed.