In 1923, the length of term for a Mayor was extended to two years to match the period for councillors.
[1] In 2013, amendments to the Local Authorities Election Act extended the term for the Mayor and Councillors to four years.
This system is said to have produced the emergence and increased representation of neighbourhood or community-based political groups.
(Two times there were two vacancies in a ward due to resignation or other cause and multi-winner STV was used) Previous to 1971 election, terms of aldermanic service were extended to three years, and all ward seats were elected simultaneously in 1971, through Single Transferable Vote.
This was Calgary's last election held using Single Transferable Vote, and would be the last one in Canada up to the present.
From 1884 to 2010 the title for elected officials on Calgary City Council excluding the Mayor, was Alderman, although Councillor was used interchangeably during that period.
On December 14, 2010, council voted to change the title to councillor, which took effect in the October 2013 election.