[Unklejoe]

I'd rather just use TAI and never have to worry about anything. Let the conversion to UTC be the client's problem.

Having the length of a second always be the same is kind of important.

[FabHK]

For logs, fine. But you do deviate more and more from what the world is using (as of 2017, TAI is exactly 37 seconds ahead of UTC, according to Wikipedia)