The most important way US elections are rigged is not voter disenfranchisement, touch screen voting machines or tampered software in ballot scanners, but media manipulation of public consciousness about the candidates.
30 days has September, April, June and November. All the rest have 31 Except February alone, Which has 28 days clear And 29 in each leap year. Or you can use the knuckle method: A knuckle is 31 days, and in between each knuckle it isn't. And where you hands meet, the two knuckles are July, August, which both have 31 days. (Note: the last knuckle isn't used). Example: October is on a knuckles, so it has 31 days.
Number of days between January 1st, 2015. The total number of days between Thursday, January 1st, 2015 and Tuesday, June 30th, 2015 is 180 days. This is equal to 5 months and 29 days. This does not include the end date, so it's accurate if you're measuring your age in days, or the total days between the start and end date.