The total number of days between Monday, November 20th, 1961 and Friday, February 29th, 1980 is 6,675 days.
This is equal to 18 years, 3 months, and 9 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. But if you want the duration of an event that includes both the starting date and the ending date, then it would actually be 6,676 days.
If you're counting workdays or weekends, there are 4,769 weekdays and 1,906 weekend days.
If you include the end date of Feb 29, 1980 which is a Friday, then there would be 4,770 weekdays and 1,906 weekend days including both the starting Monday and the ending Friday.
6,675 days is equal to 953 weeks and 4 days.
The total time span from 1961-11-20 to 1980-02-29 is 160,200 hours.
This is equivalent to 9,612,000 minutes.
You can also convert 6,675 days to 576,720,000 seconds.
November 20th, 1961 is a Monday. It is the 324th day of the year, and in the 47th week of the year (assuming each week starts on a Monday), or the 4th quarter of the year. There are 30 days in this month. 1961 is not a leap year, so there are 365 days in this year. The short form for this date used in the United States is 11/20/1961, and almost everywhere else in the world it's 20/11/1961.
February 29th, 1980 is a Friday. It is the 60th day of the year, and in the 9th week of the year (assuming each week starts on a Monday), or the 1st quarter of the year. There are 29 days in this month. 1980 is a leap year, so there are 366 days in this year. The short form for this date used in the United States is 2/29/1980, and almost everywhere else in the world it's 29/2/1980.
This site provides an online date calculator to help you find the difference in the number of days between any two calendar dates. Simply enter the start and end date to calculate the duration of any event. You can also use this tool to determine how many days have passed since your birthday, or measure the amount of time until your baby's due date. The calculations use the Gregorian calendar, which was created in 1582 and later adopted in 1752 by Britain and the eastern part of what is now the United States. For best results, use dates after 1752 or verify any data if you are doing genealogy research. Historical calendars have many variations, including the ancient Roman calendar and the Julian calendar. Leap years are used to match the calendar year with the astronomical year. If you're trying to figure out the date that occurs in X days from today, switch to the Days From Now calculator instead.