What is a Calendar Queue?

Question

I am working on a building a discrete event simulator. Wikipedia mentioned that there are several general purpose priority queues that are good for use in DES\'s. Specifically

Answer 1

A Google search finds

Study of Optimised bucket widths in Calendar Queue for Discrete Event Simulator

http://pioneer.netserv.chula.ac.th/~achaodit/paper5.pdf

which describes Calendar Queues in section 2.