Elections for Aliso Viejo City Council seats are held on the first Tuesday in November of even-numbered years, coinciding with state and national elections. Council Members are elected at-large for a four-year term. Council Members serve "staggered" terms, meaning that each election fills either two or three open seats.
The City’s Mayor and Mayor Pro Tem are selected at the first meeting of each December to serve a one-year term beginning January 1. These positions are filled by sitting Council Members by a vote of the majority of members.
Note that Aliso Viejo became Orange County's 34th city on July 1, 2001, so there's no city council history before that.