You would need to change the date of the server for this to be effective. Setting the system clock to April 2017 would do the trick, but that might have unwanted impact. Additionally you would need to check if an NTP sync is run at any point (usually boot, but potentially elsewhere) as that could set the system clock back the real time (let's not get into the philosophical debate about whether time is real though
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Would this help? If not, can you explain why this would be a problem?
Kind regards,
Robin