How many months are left until May 10, 2020? The number of months between May 10 2020 and May 10 2020 is actually smaller than it appears. The number is actually just a little more than 327! That’s not a lot, is it? Let’s take a look at the day-by-day countdown to the big day. The day of May 10, 2020 falls on Sunday, in the 19th week, of the year, in quarter 2. May has 31 days, but 2020 is a leap year, so there are 366 days total. So, if you want to know how many months are left until May 10 2020, you can use the short form, 5/10/2020, or 10/5/2020.