Not a date comes to your mind at first, but rather a specific date in time:

This date's human readable form is written as dd/mm/yyyy,
and when converted to a Unix Timestamp (epoch time), it's ddmmyyyy00.

  • dd is the two-digit day of the month
  • mm is the two-digit month month of the year
  • yyyy is the four-digit year

Note: a Unix Timestamp represents "the number of seconds that have elapsed since January 1, 1970 00:00 UTC" (Source).

This site might help: https://www.epochconverter.com/

Find such a date, if it exists. If it doesn't, please prove that it doesn't.

  • 6
    $\begingroup$ Should it be migrated to Flirting.SE ? $\endgroup$
    – Evargalo
    Jan 16 '18 at 16:24
  • 3
    $\begingroup$ I think he's wanting you to find a date that when in the format of dd/mm/yyyy, is equal to the unix timestamp that looks the same + two zeroes at the end. $\endgroup$
    – Sensoray
    Jan 16 '18 at 16:32

Is this what you're looking for?

0705199200 converts to dd/mm/yyyy 07/05/1992 (00:40)


The closest match I have found is


which has a timestamp of


which is only 2400 away from what it should be.

I used a small javascript program for it.

  var best = 1e9;
  for( var y=1970; y<2069; y++ ){
     for( var m=1; m<=12; m++ ){
        for( var d=1; d<=31; d++ ){
           var utc1 = Date.UTC(y,m-1,d)/1000;
           var utc2 = ((d*100+m)*10000+y)*100;
           var dif = Math.abs(utc1-utc2);
           if( dif<best ){
              best = dif;
              console.log(d+"/"+m+"/"+y+"  "+utc1+"  "+utc2);

You only have to search until 2069 because by then the first two digits exceed 31, so it can no longer represent a date.

  • $\begingroup$ I did my search the other way round, knowing that the yyyy part can be tuned easily. Because the hours and minutes are irrelevant, you'll see that you can actually get a Unix timestamp that matches with the readable format. $\endgroup$
    – slvrbld
    Jan 16 '18 at 16:46

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.