A closer "round" number will be 1670000000, happening next month on December 2nd 16:53:20 UTC.
But for 1700000000 we'll have to wait until next year, November 14th 22:13:20 2023 UTC.
I've noticed good times like that getting fewer and farther between.
or 01-01-01 10:10:10
Interview question: write a program to list them all!
Me: Is it OK if it doesn't print until it's done?
Interviewer: Uh, sure, why not?
Me: while(1){}
Me: Finished. This produces the exact desired output of the program you specified.
Interviewer: GTFO.
ruby -e 'require"date";a=DateTime.new(0,1,1,0,0,0);(0..4e9).each{|d|b=(a+Rational(d,86400));c=b.strftime("%y%m%d%H%M%S");puts b.strftime("%y-%m-%d %H:%M:%S")if c==c.reverse}'
About the most inefficient anyone could make it, but I think it works!