Year 2013 has 365 days and is a non-leap year. The next leap year is 2016 and will have 366 days also. The extra day in the year 2016 will fall on February 29th to help offset that the earth does not orbit around the sun in exactly 365 days. So every 4 years an extra day is added by extending February from 28 days to 29 days on the leap year with a few exceptions for years that are divisable by 100.

Monthly calendars:

January February March April May June July

August September October November December

Year 2013 Holidays shows most major holidays for year 2013. (2010 2011 2012 2014)
Today's Date where you can get quick facts about today, the current day.
Compare Dates compare year and month dates beside one another to find out
when concurrent weekdays fall to compare.
Date Calculator - this tool will show you the number of calendar days between two dates.
2013 Calendar - shows year 2013 dates and months with holidays, observances and moon dates and 2014 calendar provides the same information.
2013 countdown gives a year 2013 countdown of days remaining for the seasons and more. And for the following year countdown 2014