Count the days between two dates — or jump forward and back from one.
The first tool counts the whole days from the start date to the end date — the gap between them, so the same day start and end is zero days, and a deadline "in 30 days" is 30 days after today. The week and month figures are derived from that day count; months and years are approximate because calendar months vary in length (the calculator uses 30.44 days per month and 365.25 per year, the long-run averages). The second tool runs the other direction: give it a date and a number of days and it returns the resulting calendar date, which is the quick way to find a deadline, a due date, or a "90 days from now" milestone. Use a negative number to go backwards. For an exact age from a birth date, the age calculator breaks it into years, months and days.