title: Stop changing dates automatically in MySQL on tz change
body: <p>I am using DATETIME field to store my dates in MySQL. Without any timezone specified directly (there is just a datetime column)</p>
  
  <p>But when timezone was changed on server MySQL updated all datetime columns according to new timezone.</p>
  
  <p>Actually switching to EDT was the reason.</p>
  
  <p>I don't need to recalculate my dates automatically - just want to store specific dates in it.</p>
  
  <p>So even if tz changed manually to UTC from EST date should be same (from characters POV) if it was 2016-01-01 18:55 it should be same in any new tz..</p>
  
  <p>I did not run any scripts\queries to update dates.</p>
  
  <p>So it was performed either by MySQL itself or by server.</p>
  
  <p>Need advice what I need to check to find and disable such feature.</p>