Various start dates for the Anthropocene have been proposed, corresponding with the Holocene calendar and ranging from the beginning of the Agricultural Revolution 12,000–15,000 years ago, to as recent as the 1960s. As of June 2019, the ratification process continues and thus a date remains to be decided definitively, but the Trinity test of 1945 has been more favoured than others. In May 2019, the AWG voted for a starting date in the mid 20th century, but the final decision will not be made before 2021.