I have been using Yahoo's calendar for years and I love it. Anything
I need to remember is there permanently. I keep up with doctor's
appointments, flu shots and med refills. I use it for car scheduled
maintenance, and I also use it to log major appliance purchases.

I have asked Yahoo for the following two features more than once, but
it seems to be falling on deaf ears.

Some of my meds of the past were based on a 28 day schedule instead of
30. I can think of a few more things that also use days instead of
months. I wish you could get a reminder for x amount of days instead
of weeks or months.

Another feature I would like to see is the option to attach a scanned
receipt to a day so I would have warrantee information at my
fingertips.

Just thinking out loud. If more people find a need for these
features, more may suggest it to Yahoo.