Want to figure out the date that is exactly three hundred and five days from Dec 31, 2015 without counting?
Your starting date is December 31, 2015 so that means that 305 days later would be October 31, 2016.
You can check this by using the date difference calculator to measure the number of days from Dec 31, 2015 to Oct 31, 2016.
October 31st, 2016 is a Monday. It is the 305th day of the year, and in the 44th week of the year (assuming each week starts on a Monday), or the 4th quarter of the year. There are 31 days in this month. 2016 is a leap year, so there are 366 days in this year. The short form for this date used in the United States is 10/31/2016, and almost everywhere else in the world it's 31/10/2016.
In some cases, you might want to skip weekends and count only the weekdays. This could be useful if you know you have a deadline based on a certain number of business days. If you are trying to see what day falls on the exact date difference of 305 weekdays from Dec 31, 2015, you can count up each day skipping Saturdays and Sundays.
Start your calculation with Dec 31, 2015, which falls on a Thursday. Counting forward, the next day would be a Friday.
To get exactly three hundred and five weekdays from Dec 31, 2015, you actually need to count 427 total days (including weekend days). That means that 305 weekdays from Dec 31, 2015 would be March 2, 2017.
If you're counting business days, don't forget to adjust this date for any holidays.
March 2nd, 2017 is a Thursday. It is the 61st 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 31 days in this month. 2017 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 3/2/2017, and almost everywhere else in the world it's 2/3/2017.
This site provides an online Days From Date calculator to help you find the date that occurs exactly X days from a specific date. You can also enter a negative number to find out when X days before that date happened to fall. You can use this tool to figure out a deadline if you have a certain number of days remaining. Or read the full page to learn more about the due date if you're counting business days or weekdays only, skipping Saturday and Sunday. If you're trying to measure the number of days between two dates, you can switch to the Date Difference calculator instead.