Yahoo has single-handedly disproved Moore’s law, by finally updating their online calendar after 10 long, tech rich years. Tonight they will be rolling out a new drag-and-drop Ajax based calendar in a closed beta to Yahoo Mail users in the U.S., UK, India, Taiwan and Brazil (sign ups can be found here).

The upgraded calendar doesn’t do much that Google’s isn’t already capable of, but it does play nice with iCal and CalDAV and has a slew of new features, including; layering (viewing multiple calendars in different colors or subscribing to someone else’s calendar), zooming in when adding an appointment, integration with Flickr, setting email  or SMS reminders, and a to-do list.

With this addition to their juggernaut of offerings, Yahoo should increase their market share in online calendars, despite already being the leader. Of their 285 million Yahoo Mail users, 8.1 million use the calendar compared to the 5 million that use Google’s.

Image Credit: Yahoo