Template:ICC rankings time period

Each team scores points based on the results of their matches over the last 3−4 years − the matches played in the 12–24 months since the May before last, plus the matches played in the 24 months before that, for which the matches played and points earned both count half. For example:

	May 2010		May 2011		May 2012		May 2013		May 2014	May 2015

Between May 2013 and April 2014:		Results that were achieved during this period have 50% weighting				Results that were achieved during this period have 100% weighting

Between May 2014 and April 2015:				Results that were achieved during this period have 50% weighting				Results that were achieved during this period have 100% weighting

Each May, the matches and points earned between 3 and 4 years ago are removed, and the matches and points earned between 1 and 2 years ago switch from 100% weighting to 50% weighting. For example, on 1 May 2014, the matches played between May 2010 and April 2011 were removed, and the matches played between May 2012 and April 2013 switched to 50% weighting (the matches from May 2011 to April 2012 would have already been at 50% following the previous rerating). This happens overnight, so can result in teams changing positions in the ranking table despite no one playing.