This site provides an online "Days From Today" calculator to help you find the date that occurs exactly X days from now. You can also enter a negative number to find out when X days before today 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.
Note: If you need to calculate the number of days from a specific date, you can use the Days From Date calculator. If you're trying to measure the number of days between two dates, switch to the Date Difference calculator instead. Or if you want to choose a day in the week and count how many times it occurs in a given year, try out the How Many Days calculator.
Today is Monday, December 11th, 2017. It is the 345th day of the year, and in the 50th week of the year (assuming each week starts on a Sunday). There are 31 days in this month. 2017 is not a leap year, so there are 365 days in this year.