If you're using a 24 hour clock, then there should be ~365 of those events per year (can only have one per day by definition, every day has a corresponding day/

If you're using a 24 hour clock, then there should be ~365 of those events per year (can only have one per day by definition, every day has a corresponding day/month to hour:minute pair) -- since we're looking at events that can occur on a minutely basis, that means (days in year)/(minutes in year) so wolfram alpha says 1/1440. Two provisos: first, it's really late so there's probably something wrong with the math up there; second, that wouldn't count other significant patterns (like, 01/02 03:04 or something) because that's kinda difficult to quantify.