timeanddate.com

I was looking for a quick way to determine the number of days between two dates from a browser. I thought that there was a way to do this using Google but I can’t recall if or where I saw it. I ended up at timeanddate.com. Not the slickest UI in the world but you can use the URL syntax directly. For example, compute the duration from now until April 1, 2004. You can also use this site to generate printable calendars including moon phases and holidays (and for different locales)